Sound and Matter.pptx
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Sound is an energy associated with vibrations that travel through a medium such as air, water or solid materials. The properties of sound include pitch, determined by vibration speed, and intensity, determined by the force of vibration. Sound travels faster through solids and liquids than gas, and can be absorbed by materials like foam, fiber and cotton, or reflected by materials like glass, wood and brick.
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Sound is a longitudinal wave that travels through a medium and is caused by vibrations. The speed of sound depends on the medium, being fastest in solids and liquids and slower in gases. Loudness depends on intensity, which is determined by amplitude and distance from the source. Pitch depends on frequency, with higher frequencies being higher pitched. Humans can hear sounds between 20-20,000 Hz. Musical instruments produce sound through vibrating strings, air columns or membranes using standing waves and resonance. The ear senses sound waves, amplifies them, and transmits signals to the brain through three regions and the basilar membrane. Reflected sound waves can be used to determine distances as in sonar and to create images as in
Sound
This document discusses sound and waves. It defines sound as a form of energy produced by vibrating matter that travels in longitudinal waves. Sound travels faster through solids than liquids or gases because particles are closer together, allowing energy to transfer more quickly. The speed of sound varies based on the medium, from 331 m/s in air to over 12,000 m/s in diamond. Wavelength and frequency are also discussed, with frequency determining pitch and measured in Hertz. The human ear can detect sounds from 20-20,000 Hz. Amplitude determines loudness, which is measured in decibels. Musical instruments produce sound through vibrating materials like air, strings, or surfaces. Other types of waves include transverse, electromagnetic
Properties of sound 2017
Sound is created by vibrations traveling through a medium as longitudinal waves. The properties of sound waves, including their amplitude, frequency, wavelength, and velocity, determine characteristics like volume, pitch, and ability to reflect or absorb. Sound propagation principles state that sound energy is transferred via compression and rarefaction waves, and factors like medium, weather conditions, obstacles, and open or enclosed spaces affect how far sound travels from its source.
Properties of Sound
Sound is produced by vibrations and carried by waves through a medium like air or water. The speed of sound depends on the medium, traveling fastest in solids and slower in air or water. When sound waves strike a smooth surface they bounce back as an echo, but rough or soft surfaces absorb the sound. Properties of sound include pitch, determined by vibration frequency; quality, based on wave shape; and loudness, measured in decibels. String instruments produce different pitches depending on length, thickness, and tension of the strings.
Sound Notes
Sound is a longitudinal wave that needs a medium like air to travel through. It propagates through the air by oscillating pressure between high and low amounts. Sound travels through air at 340 m/s but can travel faster through solids. The properties of sound waves include frequency, wavelength, loudness and pitch. Loudness depends on amplitude while pitch depends on frequency. The Doppler effect alters the frequency and wavelength of sound waves when the source or observer is moving.
Notes Harmonics & Sound
1. Natural frequency is the frequency at which a system oscillates when disturbed, also called its fundamental frequency. Resonance occurs when an object is vibrated at its natural frequency, amplifying the amplitude of the wave, or when a second object vibrates along with the first, amplifying the energy.
2. Standing waves are waves that are trapped in one location, appearing as a single wave but made up of many. Sound waves are longitudinal pressure waves that travel through air, with crests of high pressure and troughs of low pressure.
3. The pitch of a sound depends on its frequency, with higher frequencies having higher pitches. Loudness depends on the amplitude of the sound wave,
Physics Sounds.
Sound is composed of compression and rarefaction waves that the human ear can detect. It is produced by vibrations that create pressure variations in a medium and can be caused by either simple or complex motions. Sound waves carry energy and are longitudinal waves where the size of the compression indicates the energy. The human ear detects sound waves through the vibration of the ear drum which are then amplified by the bones and converted to nerve impulses in the cochlea. Properties of sound waves include pitch determined by frequency, loudness by amplitude, and timbre which distinguishes between sounds of the same pitch and loudness.
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- 3. Properties of Sound • Pitch – the slowness or fastness of the vibration of the sound – Fast vibrations produce high- pitched sounds – Slow vibrations produce low- pitched sounds
- 5. • Intensity – the loudness or softness of the sound – it depends on how hard the vibrating source is struck
- 6. How Sound Travels? Medium – the carrier of the sound from the source to your ears - solid, liquid, and gas • Sound travels faster through a liquid than through a gas. • Solid medium is the best carrier of sound.
- 7. Materials that absorb sound: – Acoustic foam – Fiber – Sponge – Cotton – Wool – Cork
- 8. Materials that reflect sounds: – Glass – Wood – Brick – Concrete • Echo – is sound that is reflected back to its source
- 9. Sound Insulators: – Carpets – Curtains – Fabric in furniture – Canvas paintings
- 10. Threshold of hearing – the range at which humans can pick up a vibration and interpret it as sound • Intensity of the sound is measured in terms of decibels
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