01971nam 2200409 450 99628065870331620231206213937.01-5044-0229-4(CKB)3710000000575726(NjHacI)993710000000575726(EXLCZ)99371000000057572620231206d1965 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierIEEE No 258-1965 IEEE Test Procedure for Close-Talking Pressure-Type Microphones /IEEEPiscataway, NJ :IEEE,1965.1 online resource (12 pages)IEEE Std ;258-1965A close-talking pressure-type microphone is anacoustic transducer which is intended for use in closeproximity to the lips of the talker and is eitherhand-held or boom-mounted. Various types of microphonesare currently used for close-talking applications.These include carbon, dynamic, magnetic,piezoelectric, electrostrictive and condenser types.Each of these microphones has only one side of itsdiaphragm exposed to sound waves, and its electricoutput substantially corresponds to the instantaneoussound pressure of the impressed sound wave.Since a close-talking microphone is used in thenear sound field produced by a person's mouth, it isnecessary when measuring the performance of suchmicrophones to utilize a sound source which approximatesthe characteristics of the human sound generator.IEEE Std ;258-1965.IEEE No 258-1965MicrophoneSoundRecording and reproducingPressureMeasurementMicrophone.SoundRecording and reproducing.PressureMeasurement.621.38284NjHacINjHaclDOCUMENT996280658703316IEEE No 258-19653646974UNISA