exchange rate

4.32  exchange rate. The level in decibels that the sound level of daily noise exposure must increase (decrease) to preserve a selected measure hearing damage risk when the exposure duration is halved (doubled). See also 4.23, 4.45 and...

equivalent threshold force level (monaural listening)

4.30  equivalent threshold force level (monaural listening). At a specified frequency, for a specified configuration of a bone vibrator on a specified mechanical coupler, the vibration force level set up by the bone vibrator in a specified coupler when the...

equivalent threshold level (monaural earphone listening)

4.29  equivalent threshold level (monaural earphone listening). At a specified frequency, for a specified type of earphone, and for a stated force of application of the earphone to a human ear, the sound pressure level set up by the earphone in a specified...

equivalent speech recognition threshold sound pressure level

4.28  equivalent speech recognition threshold sound pressure level. For a specified speech signal, type of transducer, and manner of signal presentation, the sound pressure level produced by a transducer in a specified acoustic coupler when the voltage...