1. Maximising the acoustics of your meeting room
Glyn Chapman
Acoustic Arrangements

2. Room Acoustics Reverberation Intelligibility Feedback
Sound System Equalisation

3. Reflections

4. 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

5. Building Construction
Sound Absorption Coefficient
Example:
Painted Brick 1khz
Drape (18oz) 1khz
Pleated Drape 1khz
Full absorption = 1.0 Full reflection = 0.0

6. 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!

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

8. 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.

9. Mid Sweep EQ

10. Loudspeakers
Placement
Dispersion
Point Source ‘v’ Distributed

11. Other Tools
Notch Filters
Feedback Suppressors