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Examination of Insert Ear Interaural Attenuation (IA)Values in Audiological Evaluations
Nebi M Gumus1, Merve Gumus, Selim Unsal
1. nmgumusurgutozal.edu.tr.
Summary
Interaural Attenuation (IA) with insert earphones in audiological assessments shows increased sound leakage at lower frequencies. This study evaluated IA across frequencies, finding it higher below 1000 Hz, suggesting insert earphones are effective for masking.
Area of Science:
- Audiology
- Hearing Science
- Medical Devices
Background:
- Insert earphones are widely used in audiological assessments.
- Understanding Interaural Attenuation (IA) is crucial for accurate hearing tests.
- Previous research has established IA values for supra-aural earphones.
Purpose of the Study:
- To evaluate Interaural Attenuation (IA) based on frequency in insert earphones.
- To determine the effectiveness of ER-3A insert earphones in audiological assessments.
- To provide data supporting the use of insert earphones for masking procedures.
Main Methods:
- Thirty healthy adults (18-65 years) participated.
- Otoscopic examinations were conducted on all subjects.
- Audiological evaluations utilized an Interacoustics AC40 and ER-3A insert earphones to measure IA.
Main Results:
- Interaural Attenuation (IA) was measured across frequencies from 0.125-8.0 kHz.
- Average IA was 89±5 dB for frequencies ≤1000 Hz.
- Average IA decreased to 69±5 dB for frequencies >1000 Hz.
Conclusions:
- Insert earphones demonstrate increased Interaural Attenuation (IA) compared to traditional supra-aural earphones.
- The findings support the use of insert earphones alongside supra-aural earphones in clinical settings.
- Insert earphones facilitate easier masking applications due to their IA characteristics.
