That magnitude of a complex sound that produces a sound-level meter reading equal to the reading that results from a sound pressure of 0.0002 dyne per cm at 1 kHz. Also called reference sound level.
"Just to say that you've done an incredible Job!!!. I really want to thank Dr. Cristian Coban for his GREAT WORK. The restoration of the bird's song that was mixed so deeply with terrible background noise which included loud humming, cracks and other matter, was truly amazing!. This song was recorded from a 1950's radio so you can imagine how ..."