If we adopt the quasi-peak measurement audio signal's dynamic range, some symphony up to 100 dB dynamic range above or higher.

Because normally the electro-acoustic equipment, technical specifications are given quasi-average noise level, rather than quasi-peak noise level, this should be noted.

Obviously, the dynamic threshold is to use quasi-peak level that, while the signal to noise ratio is expressed with the quasi-average levels, and the difference is obvious in.