 VoIP and conventional telephone speech comprehension will be compared with and without a wireless bluetooth phone clip Cochlear Wireless Phone Clip, Cochlear Ltd., 1 University Avenue, Macquarie University, New South Wales 2109, Australia. The phone clip is capable to directly connect to other bluetooth-enabled devices and transmits the audio signal directly to the sound processor of the hearing implant. A microphone in the phone clip enables to record and transmit the users spoken words to the mobile phone therefore a hands-free use is possible. 