4.37 hearing level for speech. For a specified speech signal, for a specified type of transducer, and for a specified manner of presentation, the speech level minus the appropriate speech recognition threshold signal. Unit, decibel (dB)....
4.35 free-field sensitivity (of an earphone). At a given frequency, for at least 10 otologically normal subjects, quotient of sound pressure level, or force level, of a frontally incident plane progressive wave by input voltage to an earphone, or bone...
4.34 free-field equivalent earphone output level. At a given frequency, sound pressure level produced by the earphone in an acoustic coupler or ear simulator plus a correction consisting of the difference between the free-field sensitivity level and the...
4.33 free-field equivalent bone vibrator output level. At a given frequency, vibration force level produced by the bone vibrator on a mechanical coupler plus a correction consisting of the difference between the free-field sensitivity level and the coupler...
Recent Comments