Assessment of the Speech Intelligibility Performance of Post Lingual Cochlear Implant Users at Different Signal-to-Noise Ratios Using the Turkish Matrix Test

Abstract

Background: Spoken word recognition and speech perception tests in quiet are being used as a routine in assessment of the benefit which children and adult cochlear implant users receive from their devices.Cochlear implant users generally demonstrate high level performances in these test materials as they are able to achieve high level speech perception ability in quiet situations. Although these test materials provide valuable information regarding Cochlear Implant (CI) users' performances in optimal listening conditions, they do not give realistic information regarding performances in adverse listening conditions, which is the case in the everyday environment. Aims: The aim of this study was to assess the speech intelligibility performance of post lingual CI users in the presence of noise at different signal-to-noise ratio with the Matrix Test developed for Turkish language. Study Design: Cross-sectional study. Methods: The thirty post lingual implant user adult subjects, who had been using implants for a minimum of one year, were evaluated with Turkish Matrix test. Subjects' speech intelligibility was measured using the adaptive and non-adaptive Matrix Test in quiet and noisy environments.

Effects of Cognitive Functions on Speech Recognition in Noise in Cochlear Implant Recipients

“…In our study, the mean critical SNR was found to be −1.78 ± 4.21 dB in the TMT performed using adaptive noise. Polat et al [17] obtained an average SNR of −4.90 ± 3.47 dB, using the TMT with an adaptive method with Turkish CI recipients. Hey et al [19] found a mean of −2 dB SNR, using the German matrix test with an adaptive method with German CI recipients.…”

“…While speech sound signal was played from the speaker in the front (0 azimuth), noise was played from the one in the rear (180 azimuth) (Fig. 1) [17]. TMT consists of 20 sentences, and the test battery contains a total of 50 randomly presented word-base matrix sentences.…”

Evaluation of the Effect of Musical Perception Activities on Speech Perception in Adult Cochlear Implant Users

“…The scores were calculated as signal-to-noise threshold levels (dBSNR), where the listeners could correctly repeat more than 50% of the words. Speech stimuli were presented from 0°, and continuous 65 dBSPL bubble noise was presented from 180° azimuth ( 18 ). Before the test, all subjects performed a training session ( 17 ).…”