Re: Responses to ambient sound recording

["Dan Dugan" dandugan_1999]

> A broad-band noise reference signal however cannot safely be distiguished 
> from the ambient noise. For this reason, the BLPN signal had to be much 
> louder (lets say 10 to 20dB) than the ambient noise. Otherwise, the level of 
> the test signal would be overestimated.

Agreed. I don't use BLPN in the field, I use it for calibrating my rig in my 
lab. My lab isn't isolated, but it's quiet enough to use 64 dBA, especially 
when I'm measuring the levels with an A-weighted filter.

BLPN is the standard stimulus for calibrating the channel balances of surround 
systems.

-Dan