The effect of internet telephony and a cochlear implant accessory on mobile phone speech comprehension in cochlear implant users.

Huth, Markus E; Boschung, Regula L; Caversaccio, Marco D; Wimmer, Wilhelm; Mantokoudis, Georgios (2022). The effect of internet telephony and a cochlear implant accessory on mobile phone speech comprehension in cochlear implant users. European archives of oto-rhino-laryngology, 279(12), pp. 5547-5554. Springer 10.1007/s00405-022-07383-x

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In individuals with severe hearing loss, mobile phone communication is limited despite treatment with a cochlear implant (CI). The goal of this study is to identify the best communication practice for CI users by comparing speech comprehension of conventional mobile phone (GSM) calls, Voice over Internet Protocol (VoIP) calls, and the application of a wireless phone clip (WPC) accessory.


This study included 13 individuals (mean age 47.1  ± 17.3 years) with at least one CI. Frequency response and objective voice quality were tested for each device, transmission mode and the WPC. We measured speech comprehension using a smartphone for a GSM call with and without WPC as well as VoIP-calls with and without WPC at different levels of white background noise.


Frequency responses of the WPC were limited (< 4 kHz); however, speech comprehension in a noisy environment was significantly improved compared to GSM. Speech comprehension was improved by 9-27% utilizing VoIP or WPC compared to GSM. WPC was superior in noisy environments (80 dB SPL broadband noise) compared to GSM. At lower background noise levels (50, 60, 70 dB SPL broadband noise), VoIP resulted in improved speech comprehension with and without WPC. Speech comprehension scores did not correlate with objective voice quality measurements.


Speech comprehension was best with VoIP alone; however, accessories such as a WPC provide additional improvement in the presence of background noise. Mobile phone calls utilizing VoIP technology, with or without a WPC accessory, result in superior speech comprehension compared to GSM.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Hearing Research Laboratory

UniBE Contributor:

Huth, Markus, Boschung, Regula Leonie, Caversaccio, Marco, Wimmer, Wilhelm, Mantokoudis, Georgios


600 Technology > 610 Medicine & health








Pubmed Import

Date Deposited:

26 Apr 2022 10:36

Last Modified:

05 Dec 2022 16:19

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Uncontrolled Keywords:

Cochlear implants Communication aids for disabled Speech comprehension VoIP




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