Environmental Medicine Integrating a Missing Element into Medical Education (1995) / Chapter Skim
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Case Study 51: Acoustic Trauma Caused by the Telephone: A Report of Two Cases
Case Study 51: Acoustic Trauma Caused by the Telephone: A Report of Two Cases
Pages 862-867
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From page 862... ...
The auditory insult resulted, in the case involving a cord-type telephone, from the transmission of a loud, extraneous sound probably due to a misfunction of the circuit and, in the second case, from the patient holding his cordless telephone against his ear when ringing occurred. Acoustic traumata resulting from the use of cordless telephones have recently been reported.
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From page 863... ...
In 1 patient the auditory insult resulted from the transmission of a loud, extraneous crack sound by a cord-type telephone: this is the first case report of trauma caused by a noncordless telephone. Case Report Case I A healthy 56-year-old woman was referred to the ENT Department of the University Hospital of Geneva on October 28, 1986.
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From page 864... ...
. The review of the cord-type telephone used by this patient revealed that it was made to receive several calls at the same time, and, like cordless units, had the ringing device located in the ear receiver.
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From page 865... ...
The hearing loss caused by cordless telephones results most frequently from the patient neglecting to switch from the normal 'standby' position to the 'talk' mode before placing the receiver to the ear so that the audiodevice will not continue to ring directly into the ear. In some instances, the injury has been reportedly caused by the transmission of a loud, extraneous crack noise likely resulting from a misfunction of the circuit of the phone.
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From page 866... ...
The typical acoustic trauma notch in the 3- to 6-kHz range is not a common finding in this group of patients. This unfortunate exper~ence with human subjects illustrates the findings of many experimental studies documenting the relation between maximum stimulation and maximum damage positions along the organ of Corti [6-8]
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From page 867... ...
867 Dr. Jean-Philippe Guyot Clinic of Otolaryngology Head and Neck Surgery Cantonal University Hospital 24, rue Micheli~u-Crest CH-1211 Geneva 4 (Switzerland)
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