An evaluation of the Sennheiser HDA 280-CL circumaural headphone for use in audiometric testing.
Objective: Evaluation of the Sennheiser HDA 280-CL circumaural headphone for the determination of (1) equivalent threshold sound pressure levels (ETSPL) for 125-18,000 Hz.; (2) real ear attenuation (250-8000 Hz); (3) insertion loss (63-18,000 Hz); (4) frequency response (125-18,000 Hz); (5) total harmonic distortion (THD) (125-10,000 Hz); and, (6) linearity (11,200-18,000 Hz).Study Sample: Twenty-five normal hearing adults aged 18-25 participated in (1) and (2).Design: (1) Hearing thresholds were measured using the Sennheiser HDA 280-CL. Frequency specific ETSPL values were calculated in an artificial ear. (2) Sound field thresholds were measured with the ears open and covered with the headphone to obtain the real ear attenuation thresholds (REAT). These values were used to determine the maximum permissible ambient noise levels (MPANL). (3) A B&K HATS mannequin recorded the output levels of a broadband pink noise with the ears open and covered with the headphones. (4, 5) The frequency response, THD and linearity were measured in an artificial ear.Results: Values for ETSPL, REAT, MPANL, insertion loss, as well as measures of frequency response, THD and linearity are presented.Conclusions: The Sennheiser HDA 280-CL meets the requirements for audiometric testing and the values presented can be used for calibration.
['Folkeard|Paula|P|', 'Hawkins|Marianne|M|', 'Scollie|Susan|S|', 'Sheikh|Bilal|B|', 'Parsa|Vijay|V|']
D000293:Adolescent D000328:Adult D001299:Audiometry D001309:Auditory Threshold D002138:Calibration D004423:Ear D055615:Electrical Equipment and Supplies D004867:Equipment Design D005260:Female D064368:Healthy Volunteers D006309:Hearing D006801:Humans D008297:Male D009622:Noise D011312:Pressure D013016:Sound D055815:Young Adult
Circumaural headphone ETSPL REAT extended high frequencies