NBS-9A coupler-to-eardrum transformation: TDH-39 and TDH-49 earphones
- 31 December 1985
- journal article
- research article
- Published by Acoustical Society of America (ASA) in The Journal of the Acoustical Society of America
- Vol. 79 (1) , 120-123
- https://doi.org/10.1121/1.393634
Abstract
A transformation was derived to convert sound‐pressure levels referenced to an NBS‐9A coupler to corresponding eardrum sound‐pressure levels. It was found that the same transformation may be used for male and female adults and for both TDH‐39 and TDH‐49 earphones in MX‐41/AR supra‐aural cushions. It was determined that from 250–2000 Hz the transformation provides an eardrum sound‐pressure level estimate that is within 6 dB of the actual eardrum level for 95% of individuals. However, in the 4000–6300‐Hz range, the accuracy deteriorates to ±12 dB of actual eardrum level for 95% of individuals.This publication has 2 references indexed in Scilit:
- Earcanal Pressure Generated by Circumaural and Supraaural EarphonesThe Journal of the Acoustical Society of America, 1966
- Earcanal Pressure Generated by a Free Sound FieldThe Journal of the Acoustical Society of America, 1966