Decibel (dB) is a unit to express variations in power. In acoustics, equal to ten times the logarithm of the ratio of one sound and a lower-intensity reference sound. One decibel indicates a difference of about 26% and is about the smallest change the ear can detect. The dB level is a logarithm quantity; the maximum normal level is approximately 120 dB.
Flanking Sound Path is termed as a sound transmission path that bypasses a transmission barrier. An example of a sound transmission path is a structural path.
Frequency is cycles per unit of time. Frequency is usually denoted in Hertz (Hz). The frequencies of audible speech lie in the range of 400-200 Hz.
Hertz (Hz) is one cycle per sound.
Reverberation is the reflection of sound off a hard surface.
Reverberation time is the time required for a sound to drop 60 decibels or to decrease to a value one millionth of its original intensity.
