THE EFFECT OF HEARING AID FREQUENCY COMPRESSION TECHNOLOGY ON P1-N1-P2 WAVES


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Sayan A., Gürkan S., Mungan Durankaya S., Kırkım G.

V. INTERNATIONAL HEALTH SCIENS CONGRESS, Balıkesir, Turkey, 1 - 02 December 2022, pp.303

  • Publication Type: Conference Paper / Summary Text
  • City: Balıkesir
  • Country: Turkey
  • Page Numbers: pp.303
  • Dokuz Eylül University Affiliated: Yes

Abstract

Aim: The most common audiogram configuration among the hearing-impaired is the type of hearing loss, which is characterized by a steep slope between 2 and 8 kHz. People with this type of hearing loss have limited access to high-frequency sounds. Commonly used hearing aids cannot provide sufficient gain to pick up high frequency sounds for many reasons. In this study, in patients with sensorineural hearing loss (SNHL), which shows a sudden decrease in high frequencies; The effect of high-frequency sounds on the audibility of the hearing aid to be increased by using frequency compression (FC) technology was investigated.

Methods: Pure tone audiometry test were applied to the individuals. Participants with the targeted audiogram configuration were identified. Hearing aids were applied to individuals to evaluate the effectiveness of frequency compression technology. Two programs were created manually. (FC on/FC Off) Cortical Auditory Evoked Potantials (CAEP) test was applied in both programs. The /t/ stimulus was used at 65 dB SPL. The latency and amplitudes of the P1-N1-P2 waves were evaluated.

Results: The latency values of the P1-N1-P2 waves were evaluated in ms and the amplitude values were evaluated in microvolts. Statistically significant shortening of the latency of P1 and P2 waves was observed when FC was On. A statistically significant increase was observed in the amplitudes of the P1 and P2 waves. No statistically significant difference was observed in N1 wave latency and amplitude. However, when FC was on, a shortening of the mean latency values and an increase in amplitudes were observed.

Conclusions: Recording CAEPs to evaluate the effectiveness of FC aimed at increasing audibility is an effective method to measure the change in audibility due to FC technology. There are many studies in the literature showing similar findings.

Keywords: Frequency compression, cortical auditory evoked potentials, hearing aid