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Architectural acoustics 1 (8 mins, ~7 MB)

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Manage episode 205946990 series 2306231
Content provided by Clive Greated and Clive Greated (c.a.greated@ed.ac.uk). All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Clive Greated and Clive Greated (c.a.greated@ed.ac.uk) or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://player.fm/legal.
Sound rays obey Snell’s law of reflection. When they strike a surface the fraction of sound energy absorbed is known as the absorption coefficient, which varies with frequency. The time for the reverberant sound in a room to drop by 60dB is known as the reverberation time R. This can be calculated from the formula R = 0.16 V/A where V is the volume in cubic metres and a is the total absorption in metric Sabin i.e. the sum of the surface areas times their absorption coefficients. If R is large the sound in the room will lack clarity but the sound level will be large. If R is small the sound will be clear but the sound level will be low. Typically R will be 1s for a theatre and 1.5-2s for a concert hall.
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11 episodes

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Manage episode 205946990 series 2306231
Content provided by Clive Greated and Clive Greated (c.a.greated@ed.ac.uk). All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Clive Greated and Clive Greated (c.a.greated@ed.ac.uk) or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://player.fm/legal.
Sound rays obey Snell’s law of reflection. When they strike a surface the fraction of sound energy absorbed is known as the absorption coefficient, which varies with frequency. The time for the reverberant sound in a room to drop by 60dB is known as the reverberation time R. This can be calculated from the formula R = 0.16 V/A where V is the volume in cubic metres and a is the total absorption in metric Sabin i.e. the sum of the surface areas times their absorption coefficients. If R is large the sound in the room will lack clarity but the sound level will be large. If R is small the sound will be clear but the sound level will be low. Typically R will be 1s for a theatre and 1.5-2s for a concert hall.
Wedges
  continue reading

11 episodes

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