The document discusses the physics of sound. It defines sound as a pressure wave that travels faster through solids than liquids or gases. Sound waves are longitudinal waves that create compressions and rarefactions. The key characteristics of a sound wave are its frequency, amplitude, wavelength, and speed. Frequency is measured in Hertz and determines the pitch of a sound. Amplitude determines loudness. Wavelength is the distance between compressions or rarefactions. Sound waves can be reflected, transmitted, absorbed, or cause diffraction or reverberation when interacting with surfaces. The range of normal human hearing is between 20-20,000 Hz. Different materials are used to absorb sound like porous absorbers, panel absorbers, and resonators
“a science that deals with the production, control, transmission, reception, and effects of sound.”
it is the science of controlling sound within buildings.
Acoustics is the study of sound waves and how they are generated, propagated, and received. When designing buildings, several acoustical factors must be considered, including reverberation, focusing of sound, echoes, unwanted resonance, interference, and extraneous noise. Reverberation is the persistence of sound after the sound source stops emitting sound, and the reverberation time depends on the size, surface materials, and absorption coefficients of the space. The Sabine formula relates reverberation time to the volume and absorption of a space. Proper acoustics in buildings ensures sound is uniformly distributed and factors like echoes, resonance, and interference are minimized.
The document discusses techniques for improving speech privacy and reducing acoustic distractions in work and public spaces. It describes how sound travels and can be absorbed, blocked, or covered using materials like acoustic panels or background noise/sound masking. The "ABC" system recommends using absorption, blocking, and covering techniques together. Open plan work environments can improve communication but reduce concentration due to lack of privacy and noise. Proper layout and equipment are discussed for effective public address and sound systems.
This document provides an overview of architectural acoustics. It defines acoustics as the science dealing with the production, control, transmission, reception, and effects of sound. It discusses how different materials reflect, transmit, or absorb sound waves. Hard surfaces like tile and wood tend to reflect sound waves and cause echoes, while soft surfaces like textiles and insulation absorb sound waves. It then discusses some pioneers in acoustics like Pythagoras and how the early Greek civilization was concerned with acoustic design of theaters. Finally, it briefly touches on topics like resonance, standing waves, interference, and provides some examples of acoustic panels.
Sound is a disturbance that passes through a medium as longitudinal waves, causing the sensation of hearing. The speed of sound differs depending on the molecular composition of the medium. When sound waves encounter barriers in an enclosed space, they can be reflected, absorbed, refracted, diffused, diffracted, or transmitted. Reflection occurs when the wavelength is smaller than the surface, causing the waves to hit the enclosure continuously until the energy reduces to zero. Absorption occurs when some of the wave's energy is lost through transfer to barrier molecules. Refraction is the bending of sound waves when passing between different media. [END SUMMARY]
This document discusses architectural acoustics and provides information on sound classification, characteristics of musical sound, intensity, absorption coefficient, sound absorbing materials, reverberation, and factors affecting building acoustics such as reverberation time, loudness, focusing, echo, echelon effect, and resonance. It also covers noise control and discusses remedies for improving acoustics issues in buildings.
1) Acoustics refers to vibrations that are audible to humans, ranging from 20-20,000 Hertz. All sounds originate from object vibrations.
2) Key characteristics of sound include requiring a medium to propagate, having a finite velocity, and traveling at different speeds in different materials. Sounds can be classified by pitch, timbre, and intensity.
3) Important factors that affect building acoustics include optimizing reverberation time, avoiding uneven loudness or focusing due to interference or resonance, and reducing echoes and noise. Absorbing materials and proper ventilation help address these factors.
The document discusses the physics of sound. It defines sound as a pressure wave that travels faster through solids than liquids or gases. Sound waves are longitudinal waves that create compressions and rarefactions. The key characteristics of a sound wave are its frequency, amplitude, wavelength, and speed. Frequency is measured in Hertz and determines the pitch of a sound. Amplitude determines loudness. Wavelength is the distance between compressions or rarefactions. Sound waves can be reflected, transmitted, absorbed, or cause diffraction or reverberation when interacting with surfaces. The range of normal human hearing is between 20-20,000 Hz. Different materials are used to absorb sound like porous absorbers, panel absorbers, and resonators
“a science that deals with the production, control, transmission, reception, and effects of sound.”
it is the science of controlling sound within buildings.
Acoustics is the study of sound waves and how they are generated, propagated, and received. When designing buildings, several acoustical factors must be considered, including reverberation, focusing of sound, echoes, unwanted resonance, interference, and extraneous noise. Reverberation is the persistence of sound after the sound source stops emitting sound, and the reverberation time depends on the size, surface materials, and absorption coefficients of the space. The Sabine formula relates reverberation time to the volume and absorption of a space. Proper acoustics in buildings ensures sound is uniformly distributed and factors like echoes, resonance, and interference are minimized.
The document discusses techniques for improving speech privacy and reducing acoustic distractions in work and public spaces. It describes how sound travels and can be absorbed, blocked, or covered using materials like acoustic panels or background noise/sound masking. The "ABC" system recommends using absorption, blocking, and covering techniques together. Open plan work environments can improve communication but reduce concentration due to lack of privacy and noise. Proper layout and equipment are discussed for effective public address and sound systems.
This document provides an overview of architectural acoustics. It defines acoustics as the science dealing with the production, control, transmission, reception, and effects of sound. It discusses how different materials reflect, transmit, or absorb sound waves. Hard surfaces like tile and wood tend to reflect sound waves and cause echoes, while soft surfaces like textiles and insulation absorb sound waves. It then discusses some pioneers in acoustics like Pythagoras and how the early Greek civilization was concerned with acoustic design of theaters. Finally, it briefly touches on topics like resonance, standing waves, interference, and provides some examples of acoustic panels.
Sound is a disturbance that passes through a medium as longitudinal waves, causing the sensation of hearing. The speed of sound differs depending on the molecular composition of the medium. When sound waves encounter barriers in an enclosed space, they can be reflected, absorbed, refracted, diffused, diffracted, or transmitted. Reflection occurs when the wavelength is smaller than the surface, causing the waves to hit the enclosure continuously until the energy reduces to zero. Absorption occurs when some of the wave's energy is lost through transfer to barrier molecules. Refraction is the bending of sound waves when passing between different media. [END SUMMARY]
This document discusses architectural acoustics and provides information on sound classification, characteristics of musical sound, intensity, absorption coefficient, sound absorbing materials, reverberation, and factors affecting building acoustics such as reverberation time, loudness, focusing, echo, echelon effect, and resonance. It also covers noise control and discusses remedies for improving acoustics issues in buildings.
1) Acoustics refers to vibrations that are audible to humans, ranging from 20-20,000 Hertz. All sounds originate from object vibrations.
2) Key characteristics of sound include requiring a medium to propagate, having a finite velocity, and traveling at different speeds in different materials. Sounds can be classified by pitch, timbre, and intensity.
3) Important factors that affect building acoustics include optimizing reverberation time, avoiding uneven loudness or focusing due to interference or resonance, and reducing echoes and noise. Absorbing materials and proper ventilation help address these factors.
Notes for Architecture 4th Year subject Services. The topic is about Acoustic, how does it work for different places, how we can treat spaces according to acoustic and for better acoustic
This document discusses acoustics and sound insulation in buildings. It defines acoustics as the science of sound, including how sound is generated, propagated, and perceived. Sound insulation aims to prevent the transmission of noise between spaces. Key techniques for sound insulation discussed include using absorbing materials, double wall constructions with cavities or insulation, floating floors with resilient materials or air gaps, and suspended ceilings with air spaces above the floor. Proper insulation of walls, floors, ceilings, doors, and windows is necessary to control noise transmission in residential buildings.
The document discusses acoustics in buildings and outlines conditions for good acoustics such as producing sound that can be heard evenly throughout a space without distortions. It also covers types of noise from indoor and outdoor sources and how noise can be classified based on transmission path. The document proposes measures for noise control including suppressing noise at its source, layout planning, insulation design, and absorption design.
This document provides an introduction and overview of acoustics and noise control for mechanical systems. It defines basic acoustical terms like amplitude, frequency, and quality of sound. It discusses indoor noise criteria curves and recommendations for limiting noise from air handling systems, roof-top units, terminal boxes, chillers, and pumps through strategies like isolation, attenuation, duct lining, and space planning.
This document discusses the calculation of reverberation time. It defines reverberation time as the time it takes for sound in a room to decay by 60dB. It provides the Sabine formula to calculate reverberation time: RT60 = 0.049 V/a, where RT60 is reverberation time, V is volume, and a is total room absorption. An example calculation is shown for a classroom with given dimensions, materials, and furnishings to find its reverberation time of 1.24 seconds, which is longer than expected. Reducing reverberation time is recommended through sound absorption methods.
Sound can propagate as longitudinal waves through air and solids, and as transverse waves through solids. The velocity of sound in air depends on temperature. Common units used to measure sound include decibels (loudness), hertz (frequency), and sone and phon (perceived loudness). Sound reflects off hard surfaces similarly to light, while diffraction causes bending around obstacles. The amount of sound absorbed versus reflected by a material is quantified by its absorption coefficient. Reverberation is the prolongation of sound after the source stops due to reflections, and reverberation time is used to characterize how long reflections are audible in a space.
This document discusses various topics related to sound and architectural acoustics. It defines sound as vibrations that travel through air or another medium and can be heard. It explains that sound travels in wave patterns called sound waves, which move by vibrating surrounding objects. Sound can move through air, water or solids. It also defines key terms like longitudinal waves, transverse waves, sound intensity, frequency, speed of sound, time period, amplitude, density and more. The document discusses factors that influence architectural acoustics like geometry, materials, generation of sound. It also discusses types of materials used like sound absorbers, diffusers, barriers and reflectors.
Acoustics is the scientific study of sound, including how it behaves and is perceived. It deals with properties of sound waves like reflection, refraction, absorption, and interference. Acoustics is important for learning environments and other spaces where noise can be distracting or carry too much. Good acoustics involve distributing sound well, creating a sense of intimacy, and having proper reverberation times. Factors like reverberation time, loudness, echoes, and sound reflections off surfaces can impact architectural acoustics. A variety of materials like sound absorbers, reflectors, and diffusers are used to control sound.
The document discusses acoustics in buildings and sound insulation. It covers topics such as sound absorption, transmission, reflection, and insulation. Proper acoustical design includes considering site selection, volume, shape, interior surfaces, reverberation, seating, and absorption to achieve optimum sound quality. Sound insulation can be improved through rigid wall and floor constructions, double walls, resilient materials, and isolating noise sources. The acceptable noise levels for different building types are also provided.
The document discusses acoustics and the theory of sound. It defines acoustics as the science dealing with the production, control, transmission, reception, and effects of sound. It also defines key terms like resonance, reverberation, and echo. The document discusses how sound is generated by vibrating bodies, and how sound waves propagate through the air in longitudinal compressional waves, requiring a medium to travel through. It notes that sound propagation means the movement of sound through a medium from a source to a receiver.
The document discusses several factors that affect the propagation of sound, including wind, temperature gradients, ground interaction, and vegetation. It explains that wind can cause sound waves to refract downward in the direction of the wind and upward in the upwind direction. Temperature gradients also cause refraction, with sound refracting toward areas of lower temperature. Ground absorption and vegetation attenuation both reduce sound levels over distance. The distribution of sound from a source is illustrated and open air theater design considerations based on speech intelligibility testing are outlined.
The document discusses key factors to consider when designing music studio acoustics, including acoustic isolation, frequency balance, and reverberation. It emphasizes building walls, floors, and ceilings that are decoupled from one another using materials like gypsum boards, floating floors, dropped ceilings, and insulation to minimize sound transmission. Windows and doors should be solid core and well-sealed. Isolation rooms, booths, and movable partitions can further isolate instruments and vocals.
pioneers in acoustics
Greek philosopher and mathematician. Sought to explain the nature of all things in mathematical terms. His
greatest scientific studies were of sound: “He found that the strings of musical instruments delivered sound of
higher pitch as they were made shorter.” He discovered the relationship of pitch with string length and
recognised “if one string was twice the length of another, the sound it emitted was just an octave lower.”
47. Asimov, entry 5.
This document discusses various aspects of room acoustics, including how sound travels and interacts with surfaces. Sound can bounce off surfaces, be absorbed, diffracted, or interfere with itself. The properties of the room, including surface smoothness and materials, impact the behavior of sound. Absorptive materials can reduce reverberation time by transforming sound energy into heat. Diffraction causes sound to bend around objects. Experiments are described to understand reflection and diffraction. Different room designs, like amphitheaters and concert halls, influence the listener experience through focused or diffuse reflections.
The document discusses various topics related to architectural acoustics including:
- The definition of architectural acoustics as the study of sound generation, propagation, and transmission in buildings.
- The importance of applying acoustic principles to improve quality of life through work and leisure environments.
- The need to both enhance desirable sounds like music, while reducing undesirable noise.
Notes for Architecture 4th Year subject Services. The topic is about Acoustic, how does it work for different places, how we can treat spaces according to acoustic and for better acoustic
This document discusses acoustics and sound insulation in buildings. It defines acoustics as the science of sound, including how sound is generated, propagated, and perceived. Sound insulation aims to prevent the transmission of noise between spaces. Key techniques for sound insulation discussed include using absorbing materials, double wall constructions with cavities or insulation, floating floors with resilient materials or air gaps, and suspended ceilings with air spaces above the floor. Proper insulation of walls, floors, ceilings, doors, and windows is necessary to control noise transmission in residential buildings.
The document discusses acoustics in buildings and outlines conditions for good acoustics such as producing sound that can be heard evenly throughout a space without distortions. It also covers types of noise from indoor and outdoor sources and how noise can be classified based on transmission path. The document proposes measures for noise control including suppressing noise at its source, layout planning, insulation design, and absorption design.
This document provides an introduction and overview of acoustics and noise control for mechanical systems. It defines basic acoustical terms like amplitude, frequency, and quality of sound. It discusses indoor noise criteria curves and recommendations for limiting noise from air handling systems, roof-top units, terminal boxes, chillers, and pumps through strategies like isolation, attenuation, duct lining, and space planning.
This document discusses the calculation of reverberation time. It defines reverberation time as the time it takes for sound in a room to decay by 60dB. It provides the Sabine formula to calculate reverberation time: RT60 = 0.049 V/a, where RT60 is reverberation time, V is volume, and a is total room absorption. An example calculation is shown for a classroom with given dimensions, materials, and furnishings to find its reverberation time of 1.24 seconds, which is longer than expected. Reducing reverberation time is recommended through sound absorption methods.
Sound can propagate as longitudinal waves through air and solids, and as transverse waves through solids. The velocity of sound in air depends on temperature. Common units used to measure sound include decibels (loudness), hertz (frequency), and sone and phon (perceived loudness). Sound reflects off hard surfaces similarly to light, while diffraction causes bending around obstacles. The amount of sound absorbed versus reflected by a material is quantified by its absorption coefficient. Reverberation is the prolongation of sound after the source stops due to reflections, and reverberation time is used to characterize how long reflections are audible in a space.
This document discusses various topics related to sound and architectural acoustics. It defines sound as vibrations that travel through air or another medium and can be heard. It explains that sound travels in wave patterns called sound waves, which move by vibrating surrounding objects. Sound can move through air, water or solids. It also defines key terms like longitudinal waves, transverse waves, sound intensity, frequency, speed of sound, time period, amplitude, density and more. The document discusses factors that influence architectural acoustics like geometry, materials, generation of sound. It also discusses types of materials used like sound absorbers, diffusers, barriers and reflectors.
Acoustics is the scientific study of sound, including how it behaves and is perceived. It deals with properties of sound waves like reflection, refraction, absorption, and interference. Acoustics is important for learning environments and other spaces where noise can be distracting or carry too much. Good acoustics involve distributing sound well, creating a sense of intimacy, and having proper reverberation times. Factors like reverberation time, loudness, echoes, and sound reflections off surfaces can impact architectural acoustics. A variety of materials like sound absorbers, reflectors, and diffusers are used to control sound.
The document discusses acoustics in buildings and sound insulation. It covers topics such as sound absorption, transmission, reflection, and insulation. Proper acoustical design includes considering site selection, volume, shape, interior surfaces, reverberation, seating, and absorption to achieve optimum sound quality. Sound insulation can be improved through rigid wall and floor constructions, double walls, resilient materials, and isolating noise sources. The acceptable noise levels for different building types are also provided.
The document discusses acoustics and the theory of sound. It defines acoustics as the science dealing with the production, control, transmission, reception, and effects of sound. It also defines key terms like resonance, reverberation, and echo. The document discusses how sound is generated by vibrating bodies, and how sound waves propagate through the air in longitudinal compressional waves, requiring a medium to travel through. It notes that sound propagation means the movement of sound through a medium from a source to a receiver.
The document discusses several factors that affect the propagation of sound, including wind, temperature gradients, ground interaction, and vegetation. It explains that wind can cause sound waves to refract downward in the direction of the wind and upward in the upwind direction. Temperature gradients also cause refraction, with sound refracting toward areas of lower temperature. Ground absorption and vegetation attenuation both reduce sound levels over distance. The distribution of sound from a source is illustrated and open air theater design considerations based on speech intelligibility testing are outlined.
The document discusses key factors to consider when designing music studio acoustics, including acoustic isolation, frequency balance, and reverberation. It emphasizes building walls, floors, and ceilings that are decoupled from one another using materials like gypsum boards, floating floors, dropped ceilings, and insulation to minimize sound transmission. Windows and doors should be solid core and well-sealed. Isolation rooms, booths, and movable partitions can further isolate instruments and vocals.
pioneers in acoustics
Greek philosopher and mathematician. Sought to explain the nature of all things in mathematical terms. His
greatest scientific studies were of sound: “He found that the strings of musical instruments delivered sound of
higher pitch as they were made shorter.” He discovered the relationship of pitch with string length and
recognised “if one string was twice the length of another, the sound it emitted was just an octave lower.”
47. Asimov, entry 5.
This document discusses various aspects of room acoustics, including how sound travels and interacts with surfaces. Sound can bounce off surfaces, be absorbed, diffracted, or interfere with itself. The properties of the room, including surface smoothness and materials, impact the behavior of sound. Absorptive materials can reduce reverberation time by transforming sound energy into heat. Diffraction causes sound to bend around objects. Experiments are described to understand reflection and diffraction. Different room designs, like amphitheaters and concert halls, influence the listener experience through focused or diffuse reflections.
The document discusses various topics related to architectural acoustics including:
- The definition of architectural acoustics as the study of sound generation, propagation, and transmission in buildings.
- The importance of applying acoustic principles to improve quality of life through work and leisure environments.
- The need to both enhance desirable sounds like music, while reducing undesirable noise.
Building acoustics is the science of controlling sound in buildings by minimizing noise transmission between spaces. Characteristics of sound include reverberation time, echo, resonance, intensity, velocity, wavelength, timbre, amplitude, frequency, pitch, and loudness. Sound behaves differently with materials through absorption, diffusion, reflection, and transmission. Factors affecting building acoustics include geometry, volume, surface absorption/transmission/reflection, internal/external sound generation, and airborne transmission. Good building acoustics benefits health, productivity, privacy, intelligibility, and building value. Acoustic design incorporates absorption, diffusion, ceiling treatments, sound masking, and considers needs of different building types like residences, offices, schools,
The document discusses the acoustical design and properties of the Petaling Jaya Civic Centre auditorium. It analyzes the existing sound sources, zoning of seating areas, sound reinforcement system, and how sound travels through reflection, diffusion, absorption, and shadowing. It evaluates the materiality used including timber panels and carpet, and determines the auditorium achieves a recommended reverberation time of 1.25 seconds through its design and material choices.
The document discusses the acoustical design considerations for an auditorium. It outlines key factors such as maintaining a low ambient noise level, providing appropriate reverberation time without echoes, and how the shape, dimensions, and seating arrangements of an auditorium impact hearing conditions. Different types of materials are also described that can be used to absorb or diffuse sound such as acoustical panels, diffusers, and noise barriers to improve the auditorium's acoustics. Proper loudspeaker systems and ceiling/wall designs can further enhance the sound quality within the auditorium space.
Building service.ppt of neeru and aprajeetativar rose
This document discusses building acoustics and provides solutions for acoustic defects. It begins with definitions and characteristics of sound, including transmission, absorption, reflection, and reverberation. Common acoustic defects like echoes, reverberation, insufficient loudness, sound foci, and dead spots are described along with solutions. Various acoustic materials are presented with applications and coefficients. A case study of a hotel demonstrates acoustic design considerations for reception, doors, furniture, ceilings, floors, and glazing.
Absorption of sound, various materials, Sabine’ s formula, optimum reverberation time, conditions for good acoustics
Sound insulation: Acceptable noise levels, noise prevention at its source, transmission of noise, Noise control-general
considerations
Factors affecting acoustics of buildings and their remedies.Burhanuddin Kapadia
Acoustics plays an important role in the sound ergonomics
due to which sound can be distributed equally to entire hall.
the following slide gives an overview of the factors of acoustics and its remedies.
The document discusses factors that affect acoustics in buildings and acoustic design considerations for different types of buildings. It covers topics like reverberation time, loudness, focusing, echoes, resonance, and noise criteria. For different building types like lecture halls, classrooms, open offices, and concert halls, it provides recommendations for acoustic design including optimal reverberation times, sound absorption placement, limiting echoes and dead spots, and ensuring speech intelligibility. The document provides guidance on achieving good acoustics for various functions through room shape, materials used, and mechanical system design.
This document discusses architectural acoustics and provides information on sound classification, characteristics of musical sound, intensity, absorption coefficient, sound absorbing materials, reverberation, and factors affecting building acoustics such as reverberation time, loudness, focusing, echo, echelon effect, resonance, and noise. It explains how sound is classified into infrasound, audible sound, and ultrasound. Musical sound produces a pleasing effect while noise produces a jarring effect. Absorption coefficient measures the ratio of absorbed to incident sound energy. Various sound absorbing materials and methods to control reverberation time, noise, and other acoustic issues in buildings are also described.
WHAT IS ACOUSTICS? what is sound? AMPLITUDE AND VOLUME, FREQUENCY AND PITCH
LOUDNESS OR INTENSITY
LOUDNESS OR INTENSITY
LOUDNESS OR INTENSITY, TIMBRE
VELOCITY OF SOUND
AMPLITUDE
REFLECTION
This document discusses sound waves and room acoustics. It explains that sound travels as longitudinal waves through air and other substances. When sound waves hit surfaces in an enclosed space, they are reflected and create reverberation over time. The time it takes for reverberation to decay by 60dB is known as the reverberation time or RT60, which provides an objective measurement of room acoustics. Room reflections are important for both the direct sound picked up by microphones and the diffuse room tone, which conveys information about the size and surfaces of the space.
The document presents an analysis of the acoustic design of the Auditorium Cempaka Sari in Putrajaya, Malaysia, including its architectural design, materials used, acoustic phenomena, and measurements taken of sound levels within the auditorium. It describes the auditorium's shape, volume, seating and stage configuration, and finishes used to achieve the desired reverberation time. Methodologies for data collection including equipment used are also outlined.
This document discusses acoustics and noise control. It begins by defining acoustics and describing the basics of sound, including properties like amplitude, frequency, wavelength. It then explains sound propagation principles such as reflection, refraction, diffraction and absorption. Different materials and their effects on sound are described. Noise control techniques like site planning, architectural design and sound barriers are discussed. Specific examples of architectural designs that enhance sound are provided.
The document discusses the acoustic design analysis of the Auditorium Cempaka Sari in Putrajaya, Malaysia. It includes an introduction describing the purpose of acoustic design in controlling sound behavior within an enclosed space like an auditorium. It then provides details on the auditorium's historical background, site information, drawings, methodology used in the acoustic analysis including measuring instruments, data collection methods, and sound equipment specifications. The document also discusses key acoustic phenomena like reverberation, attenuation, echoes and sound shadows. It analyzes the auditorium's design, materials, acoustic treatments and components, sound sources and noise sources. Measurement data on sound levels at different positions is also presented.
a case study of acoustic design presentationYen Min Khor
The document analyzes the acoustic design of the Connexion@Nexus auditorium. It finds that while the auditorium avoids echoes allowing speech to be easily discerned, it has a reverberation time that is too short at 0.26 seconds. The overly absorbent materials used throughout also reduce reflected sound, contributing to the suboptimal reverberation time. Additionally, the auditorium exhibits other acoustic defects like flutter echoes on stage and inefficient ceiling reflectors. Based on this analysis, the objective of determining if Connexion@Nexus is a good design for its intended multi-purpose use is answered with a no.
The document discusses acoustics in auditoriums. It defines acoustics and sound, and discusses topics like sound frequency and intensity, reflection of sound, defects due to reflected sound like echoes and reverberation, Sabine's equation for calculating reverberation time, absorbent materials used in auditoriums, acoustic design considerations for auditoriums including volume, shape, seating, and defects that can occur. It also covers noise mapping and sound insulation. The overall goal is to provide guidelines for designing auditoriums with good acoustics.
Architectural acoustics deals with controlling sound in buildings by managing how sound is transmitted, absorbed, diffracted or reflected. The goal is to reduce unwanted noise and improve listening conditions. Proper design of acoustical spaces like theaters and auditoriums is important for evenly distributing sound without defects like echoes or dead spots. The size, shape and orientation of rooms, as well as sound-absorbing and reflective materials used in construction, impact a building's acoustical qualities. Architectural acoustics provides guidance to designers on room acoustics and achieving the optimal reverberation time for different types of spaces.
Sports Acoustics is an important branch of Sports Engineering. Sound makes sports wonderful. This presentation is prepared by ANEESH K S, Certified Sports Engineer (Trainee) at Sports & Management Research Institute (SMRI)
This presentation was provided by Rebecca Benner, Ph.D., of the American Society of Anesthesiologists, for the second session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session Two: 'Expanding Pathways to Publishing Careers,' was held June 13, 2024.
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.pptHenry Hollis
The History of NZ 1870-1900.
Making of a Nation.
From the NZ Wars to Liberals,
Richard Seddon, George Grey,
Social Laboratory, New Zealand,
Confiscations, Kotahitanga, Kingitanga, Parliament, Suffrage, Repudiation, Economic Change, Agriculture, Gold Mining, Timber, Flax, Sheep, Dairying,
Temple of Asclepius in Thrace. Excavation resultsKrassimira Luka
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
🔥🔥🔥🔥🔥🔥🔥🔥🔥
إضغ بين إيديكم من أقوى الملازم التي صممتها
ملزمة تشريح الجهاز الهيكلي (نظري 3)
💀💀💀💀💀💀💀💀💀💀
تتميز هذهِ الملزمة بعِدة مُميزات :
1- مُترجمة ترجمة تُناسب جميع المستويات
2- تحتوي على 78 رسم توضيحي لكل كلمة موجودة بالملزمة (لكل كلمة !!!!)
#فهم_ماكو_درخ
3- دقة الكتابة والصور عالية جداً جداً جداً
4- هُنالك بعض المعلومات تم توضيحها بشكل تفصيلي جداً (تُعتبر لدى الطالب أو الطالبة بإنها معلومات مُبهمة ومع ذلك تم توضيح هذهِ المعلومات المُبهمة بشكل تفصيلي جداً
5- الملزمة تشرح نفسها ب نفسها بس تكلك تعال اقراني
6- تحتوي الملزمة في اول سلايد على خارطة تتضمن جميع تفرُعات معلومات الجهاز الهيكلي المذكورة في هذهِ الملزمة
واخيراً هذهِ الملزمة حلالٌ عليكم وإتمنى منكم إن تدعولي بالخير والصحة والعافية فقط
كل التوفيق زملائي وزميلاتي ، زميلكم محمد الذهبي 💊💊
🔥🔥🔥🔥🔥🔥🔥🔥🔥
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
5. Sound
Impression
• Where we are beside can feel the sound .
Normally we distinguish between sound and
Noise
• Sound - Pleasant Impression as Sound
• Noise – More Chaotic and obtrusive as Noise
6. Bus stand Music Hall Forest
Sound Impression
Acoustic Deals with the production, propagation and detection of sound waves
• Infrasonic < 20 Hz (Inaudible)
• Audible 20 to 20,000Hz (Music and Noise)
• Ultrasonic > 20,000Hz (Inaudible)
1 Hz Equal to one vibration per second
7. Characteristics of sound
A scale which
measure the
sensation depends
on Frequency
Pitch Number of
vibrations of sound
producing object per
second
Frequency International
Telecommunications
Union (ITU) for
radar and radio
communications.
3MHz to 30 MHz
High frequency
Low frequency Transfer energy one
form another place
Transverse and
Longitudinal waves
Waves
International
Telecommunications
Union (ITU) for
radar and radio
communications.
30KHz to 300 MHz
8. Characteristics of sound
Intensity - Amount of sound energy
flowing per sec per unit area
I = Q /A watt/m2
Loudness degree of sensation varies
from one observer from other
Intensity or Loudnes
Distinguish b/w any two or more musical
sound having same pitch and frequency
Smallest frequency is called fundamental
and frequencies accompanying
fundamental are called overtones.
Quality or Timbre
Intensity or Loudness
Quality or Timbre
Weber- Fechner Law
Loudness is directly proportional to
the logarithm of intensity
L α log I
L = K log I
k is the constant
10. Acoustics for Music
Generally, it involves broad range of frequency
spectra (about 50 to 8,500 Hz, for an average
dynamic range of about 75 dBA). Orchestra,
Symphony hall etc.,
Acoustics for Multipurpose
Both Speech & Music Acoustics design of a
multipurpose space is quite challenging as the
design objectives and measures vary remarkably for
speech and music
Chruch Cinema Theatre etc.,
Building
Acoustics Acoustics for Speech
covers narrow range of frequency spectra in lower-mid
level (about 170 to 4,000 Hz, for an average dynamic
range of 42 dBA). Class room, Assembly etc.,
11. GoodAcoustic Building
Designs and constructions
Not uniform Intensity
Sound interfere reduce
the quality
Factors to be considered
• Reverberation time
• Loudness
• Focusing and interference
• Echoes and Echelon effect
• Resonance and
• Extraneous noise
Acoustic BuildingsFACTOR
12. Reverberation
persistence or prolongation of sound in
a hall even though the sound source is
stopped.
Reverberation
sound disappear quickly and become
inaudible.
Reverberation time Low
The time taken by the sound wave to
fall below the minimum audibility level
after the source is stopped
Reverberation Time
sound exist for a long period of time -
an overlapping of successive sounds -
can not hear the information clearly
Reverberation time to high
The reverberation time should be kept
at an optimum value
Good Auditability
13. Loudness and Echo
Measures the magnitude
of sensation produced in
the ear.
Loudness
Uniform distribution of
loudness must be
maintained throughout
the hall
Loudness
If the time interval
between the direct
sound and the reflected
sound is less than 1/15
of a second,.
Echo
Sound get scattered by
wall, instead of
reflection .
Echo
The reflected sound
reaches the audience
later than the direct
sound
Echo
Uniform distribution of
loudness must be
maintained throughout
the hall.
Loudness
14. Echelon Effect & Resonance
Echelon effect
New sound produced by repetitive echoes - regular
Reflecting surface like stair case may create this effect
Resonance
If window panels or any other wooden sections are not
covered properly, the original sound may vibrate with
the natural frequency of them.
15. Focusing and Interference Effect
Focus
Reflected sound by the ceiling and wall must be distributed evenly
throughout the hall rather it should not be focused at a particular area
of the hall..
Interference
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Reflect and distribute the sound evenly.
Focuses the sound in the
front portion only.
Maximum sound intensity occurs
Minimum sound intensity occurs
16. Noise
N O I S
S
Outside noise which
reaches the audience
through window, door
and ventilator
Air borne Noise
W
Noise reaches the
audience through the
structural defect of the
building.
Structure Borne
Noise produced inside
the hall like crying kids,
the sound generated by
type writers, fan, A/C,
Refrigerators, etc.,
Inside Noise
I
E
SA
17. Remedies
0201 Reverberation
• Reduced by installing sound absorbing
materials like
• Windows and openings
• Arranging full capacity of audience
• Completely covering the floor with carpets
• False ceilings
• Heavy curtains with folds decorating walls
Loudness and Echo
• Lowering the ceiling and placing
reflecting surfaces at necessary
places.
• Cover such regular reflecting
surfaces properly.
0403 Focusing & Interference
• Radius of curvature of concave
ceiling should be two times the
height of the building.
• cover the curved surfaces with
proper sound absorbing materials
• The usage of uniform painting
and absorbent it may be avoided
Resonance and Noise
• Vibrating materials should be mounted on
non-vibrating and sound absorbing
materials.
• Panels must be fitted properly.
• Eliminated through proper ventilation or
by Air-Conditioning
• Insulating materials
• Double walled doors, anti-vibration
mounts, carpets etc.,.
• covered with suitable sound absorbing
materials