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Acoustical and noise control concerns exist in almost every modern building
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Most commonplace acoustical issues are resolved using a consultant's assistance?
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An acoustical consultant is usually required for the design of a concert hall or to solve a complicated noise problem.
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Most sound is non-complex, generally consisting of continum of frequencies.
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Sound is the ear’s response to pressure fluctuations in the air caused by
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The lower the TL of an assembly, the greater the sound insulation provided by it
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The STC of an assembly can be improved if we make it heavier
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STC of a 2 x 4 wood stud wall with ½” gypsum board each side = 37. To improve it, we can…
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Sound originating within a room can only be reduced by using sound-absorbing materials
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Sound-absorbing materials(acoustical materials) have a sound-absorption co-efficient of
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The sound-absorptive coefficient of an assembly =
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the sound energy that is NOT reflected by the assembly divided by the total sound energy falling on the assembly
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the sound energy that IS reflected by the assembly divided by the total sound energy falling on the assembly
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A closed window is the perfect acoustical absorber because it does not reflect any sound
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The sound pressure that corresponds to the sensation of pain in the ear is approx
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Although sound pressures are small, their range is extremely large
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Massive heavyweight assemblies are horrible sound insulators
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What are the 3 basic framing members [blank_start]_____________[blank_end], [blank_start]_______________[blank_end], [blank_start]_____________.[blank_end]
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Studs & joists
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Channels
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Tracks
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Light gauge steel members are increasingly used as blocking/backing for handrails, upper cabinets, or any other secured material or assembly