RK Sound Acoustic Surveys Glossary.
Acoustic Measurements
- Background Noise
Noise break-in
Internal noise: heating, air-conditioning, lighting etc. - Reverberation Time
The reverberation time of the room is critical to speech intelligibility and musical clarity. - Reflections
By plotting the time arrival of reflections we can calculate where they are coming from. - Standing Waves
Also called room modes, these are frequencies at which the room is naturally resonant. - Flutter Echoes
They are produced by sound bouncing between parallel surfaces, with unpleasant audible results.
Electro-Acoustic Measurements
- Loudspeaker choice and locations
There are many options in loudspeaker type and their dispersion characteristics. The choice is critically linked to the results of he above measurements. - Loudspeaker time alignment
Electricity travels approximately a million times faster than sound in air. The result can cause problems when you hear the loudspeaker before you hear the talker or other loudspeakers! - Gain-before-Feedback
The familiar sound of feedback is avoidable. Let us calculate the potential and advise you how to avoid it. - Speech Intelligibility
This is the big test. It measures how successful the overall system design has been in the given acoustic environment.