What is meant by ‘good acoustics’? What makes some spaces carry sound so well, that a person doesn’t need to speak or sing very loudly to be heard way back?
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Coming from some background in Barbershop Quartet Singing, this term was thrown around a lot.
Generally I take it as meaning ‘tight reverb’. Voices are being bounced back and suddenly 4 voices sound more like a chorus. But you don’t want too much of this ‘echo’, you want a diminishing echo.
This is usually going to occur in a room with a high vaulted ceiling with some soft surfaces to dampen.
There is further magic that happens as sound waves bounce around and combine into overtones.
A little trick in guitar or vocal mix-down is to delay a signal slightly on L channel compared to R. This fattens the sound.
The delays created as you hear sound directly versus bouncing off a wall and coming back is a similar concept.
Overall, acoustics create a fatter sound out of thin air.
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