Article

Differences and intersubject variability of loudness discomfort levels measured in sound pressure level and hearing level for TDH-50P and ER-3A earphones.

Department of Otolaryngology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.
Journal of the American Academy of Audiology (Impact Factor: 1.59). 03/1997; 8(1):59-67.
Source: PubMed

ABSTRACT Loudness discomfort levels (LDLs) were measured in dB HL and SPL at discrete frequencies between 500 to 4000 Hz on 31 hearing-impaired ears using TDH-50P and ER-3A earphones. The results revealed no significant differences in the measured sound pressure level (SPL) between the two earphones at all test frequencies. However, with dB HL measurements, statistically significant differences were revealed at 1500 and 4000 Hz between earphone conditions. The results also revealed large intersubject differences in the measured LDL (HL and SPL) for both earphones. The results of this study highlight the difficulty in accurately predicting individual performance from averaged group data.

Download full-text

Full-text

Available from: Lisa G Potts, Mar 11, 2014
0 Followers
 · 
182 Views
  • Trends in Amplification 03/1997; 2(1):6-35. DOI:10.1177/108471389700200102 · 1.21 Impact Factor
  • Trends in Amplification 03/1998; 3(1):6-44. DOI:10.1177/108471389800300102 · 1.21 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Objective: The purpose of this study was to evaluate the reliability and validity of the real ear to coupler difference (RECD) and the real ear to dial difference (REDD) in predicting real ear SPL (RESPL). Design: The RESPL, RECD, and REDD were measured in the right ear of 24 normal-hearing subjects using probe microphone equipment and both insert and supra-aural earphones. The phones and probe tube were removed and replaced, and the RECD and REDD were remeasured. Results: RESPL was predicted using the RECD for insert earphone data and the REDD for supra-aural earphone data. Reliability estimates were calculated as the difference between test and retest values for the RECD and REDD. Validity estimates were calculated as the difference between measured and predicted RESPL. Results indicate that the RECD and REDD have equal and high reliability and validity in predicting RESPL. Conclusions: It is concluded that the RECD and REDD may be used as level-independent HL to SPL transforms as a substitute for in situ audiometric procedures.
    Ear and Hearing 09/1998; 19(5):407-413. DOI:10.1097/00003446-199810000-00007 · 2.83 Impact Factor
Show more