This document discusses interior acoustics in convention halls. It begins by defining a convention hall and acoustics. Good acoustics in convention halls require a low ambient noise level, acoustic gain, and appropriate reverberation time. Conditions for good acoustics include avoiding strong echoes and focusing of sound, providing intimacy and clarity, and reducing sounds and vibrations. The document then discusses various acoustic elements used in convention halls like sound absorbers, diffusers, foam panels, acoustic walls, reflectors, baffles, and banners to improve acoustics by reducing reverberation and echoes.

1. CONVENTION HALL
INTERIOR ACOUSTICS
By:-SHOURYA PURI
S.SAI GOUTHAM
5 SEM
BUILDING SERVICES
AMITY SCHOOL OF ARCHITECTURE AND PLANNING

2. Convention hall
• A large hall that is designed to hold
a convention, where individuals and groups
gather to promote and share common
interests.
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3. acoustics
• Usually very broadly defined as "the science
of sound.
• Acoustics is the interdisciplinary science that
deals with the study of all mechanical
waves in gases, liquids, and solids including
topics such as vibration , sound, ultrasound
and infrasound.
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4. ACOUSTICS CRITERIA
• Must have a low ambient noise level from
internal and external sources
• Provide a reasonable level of acoustic gain
•Provide appropriate reverberation time
•Hearing conditions in any auditorium are
considerably affected by purely architectural
considerations like:
- Shape - Layout of boundary surfaces
- Dimensions - Seating arrangements
- Volume - Audience capacity 4

5. CONDITIONS FOR GOOD ACOUSTICS I
CONVENTION HALL
• AVOIDANCE OF STRONG ECHOES
AND FOCUSING OF SOUND RAYS.
• INTIMACY, CLARITY
• REDUCTION OF SOUNDS AND
VIBRATIONS
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6. AVOIDANCE OF STRONG ECHOES AND
FOCUSING OF SOUND RAYS
• Strong echoes and focusing lead to a non
uniform sound level within the room which is
not desirable.
• These features of the auditorium design :
scatters, convex (non-focusing) ,surfaces on
balcony fronts, absorption materials, carpet .
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7. INTIMACY, CLARITY
• Intimacy implies a short time between the
first reflection of sound to the ear and the
direct sound from the source.
• Sound level of the source needs to be
distinctly higher than the background
sound. This promotes good speech
intelligibility
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8. REDUCTION OF SOUNDS AND
VIBRATIONS
• This keeps the background noise level down.
• Thick heavy walls and doors help to reduce
the background noise.
• Seals on doors are important .
• It is also important to reduce noise from air
handling systems, walking on floors and also
talking outside the room.
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9. REVERBERATION
• Reverberation is the collection of reflected
sounds from the surfaces in an enclosure
like an auditorium.
• Reverberation is an important parameter that
helps define the sound quality of an acoustic
space.
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11. INTERIOR ACOUSTIC
• SOUND ABSORBERS
• SOUND DIFFUSERS
• FOAM PANEL
• ACOUSTICAL WALL
• SOUND REFLECTORS
• BAFFEL
• BANNER
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12. SOUND NATURE
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13. SOUND ABSORBERS
• Sound absorbing acoustical panels and
soundproofing materials are used to eliminate
sound reflections to improve speech intelligibility,
reduce standing waves and prevent comb filtering.
• A wide variety of materials can be applied to walls
and ceilings depending on your application and
environment.
• These materials vary in thickness and in shape to
achieve different absorption ratings depending on
the specific sound requirements
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Acoustic Foam Sound Absorb
Sponge environment production sound
absorber

15. SOUND DIFFUSERS
• These devices reduce the intensity of
sound by scattering it over an expanded
area, rather than eliminating the sound
reflections as an absorber would.
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Sound Reflector Diffuser Ovation Reflector
Panels

18. FOAM PANEL
• Acoustical foam panels are used as a
sound absorber to reduce reverberation
and echoes.
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wooden acoustic panel

19. WALL PANEL
• Acoustical Wall Panels are the solution for
areas that require noise reduction with a
high quality fabric finish.
• standard or custom sizes up to 4' x 10'
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20. BAFFEL
• Baffle is a device which used in halls to
reduces the strength (level) of airborne
sound
• Sound baffles are a fundamental tool
of noise mitigation, the practice of
minimizing reverberation.
• Sound baffles are also applied to walls
and ceilings in building interiors
to absorb sound energy and thus lessen
reverberation.
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22. BANNER
• Acoustic Banners are large, visually and
architecturally pleasing sound absorbers.
• They can be hung in a loose flowing
fashion or installed flush to the roof deck
for a flat appearance.
• Installation of these materials reduce
reverberation
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24. ACOUSTIC WALL
• Acoustical wall fabric is a dimensional fabric that
offers excellent acoustical properties, unmatched
fade resistance, and a fire/smoke retardant.
• Sound channels is resistant to moisture, mildew,
rot, bacteria, and is non-allergenic.
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Features:
•Lightweight Acoustic Fabric
•Easy to install
•Class A
•Passes Corner Burn Test
•Available in Many Colors
•Durable / Abuse Resistant
•Improves Speech
Intelligibility

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27. Reflective near speaker, absorption in rear

28. THANK YOU
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