Maximising the acoustics of your meeting room Glyn Chapman Acoustic Arrangements

Room Acoustics Reverberation Intelligibility Feedback Sound System Equalisation

Reflections

Shapes of room Worst possible room shape is a cube. The next worst is a room where all dimensions are multiples of the height. A pretty horrible example is a room 6m high, 12m wide, and 18m long. A good shape would be, say, 6m high, 10m wide and 14m long

Building Construction Sound Absorption Coefficient Example: Painted Brick 0.02 @ 1khz Drape (18oz) 0.48 @ 1khz Pleated Drape 0.75 @ 1khz Full absorption = 1.0 Full reflection = 0.0

Acoustic Treatments If it soaks up water, it soaks up sound! Carpets, Drapes, Soft Furnishings Acoustic Panels You can’t fix it in the mix!

Graphic Equalizers Removes rooms resonant frequencies Increases headroom Improves tonality Increases intelligibility

How to set your graphic eq Pink Noise and RTA Auto EQ products – dbx Driverack Ringing Out Sensitive flat response microphone. Flat EQ on mic channel and graphic. Set gain level just below feedback. Increase each band until feedback and reduce by inverse amount. or Increase gain until feedback and reduce offending frequency.

Mid Sweep EQ

Loudspeakers Placement Dispersion Point Source ‘v’ Distributed

Other Tools Notch Filters Feedback Suppressors

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