# 331 5.1 Clinical Decibel

 The flashcards below were created by user shanamd2010 on FreezingBlue Flashcards. threshold of audibility MAF - minimum audible field MAP - minimal sudible pressure testing hearing requires speakers and a microphone MAF minimum audible field hearing aids and speakers MAP minimal audible pressuretest hearing and microphone cannot test... pure tones on a speaker low frequencies hear or feel? lowest = 20 Hz lower than 20 Hz you feel but dont hear high frequencies top end = 20,000 Hz higher than this and you would hear your own heart beat frequencies best for speech 1,000 - 4,000 Hz Willis Beasley ASA 19511st portible audiometer normal hearing ages 18 - 25 years best hearing is at infancy, but is difficult to test on infants Dadson and King ISO 1964 large revision of audiograms in 1996 ANSI 1969 American National Standards Institute ASA Audiologist Society of Australia ISO International Society of Audiology hearing test accuracy is.. +/- 5 dB normal people can hear 70 dBspl dBhl hearing level or hearing threshold level normal hearing for everyone 0 dBhl = threshold for normal hearing if you have a 60 dBhl then you cannot hear anything below 60 dBhl and you are 60 away from normal dBsl sensation level the amount you are above a patient's threshold 0 dBsl = threshold for a particular patient if a patient's threshold is 50dBhl you would test.. above that, say 70 dBhl, so that you would be at 20 dBsl 0 dBhl @ 1000 Hz = 7dBspl 70 dBhl @ 1000 Hz = __dBspl 60 dBhl @ 1000 Hz = __dBspl 7767 0 dBhl @ 2000 Hz = 9 dBspl 50 dBhl @ 2000 Hz = __dBspl 59 0 dBhl @ 1000 Hz = 7 dBspl Abby threshold @1000 Hz = 30 dBhl __dBspl --> 60 dBhl = 67 dBspl 67 0 dBhl @ 1000 Hz = 7 dBspl Abby threshold @1000 Hz = 30 dBhl 10 dBspl --> __dBhl 40 50 dBhl --> __dBsl 20 40 dBsl --> __dBspl 40 dBsl --> 70 dBhl70 dBhl --> 77 dBspl Authorshanamd2010 ID131684 Card Set331 5.1 Clinical Decibel DescriptionCDO 331 Updated2012-01-30T18:15:43Z Show Answers