106:). In France, researchers report the study of a case of acoustic shock in a scientific publication. They suggest that these symptoms may result from a loop involving the middle ear muscles, peripheral inflammatory processes, activation and sensitization of the trigeminal nerve, the autonomic nervous system, and central feedbacks.
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may continue for days, weeks or indefinitely. It has not been established how such unrelated symptoms might be caused by an acoustic exposure, or whether such symptoms are even a direct result of exposure. There is literature that suggests acoustic shock is not a pathological entity but predominantly
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to be ineffective (data from these trials has not been released into the public domain). Limiting background noise and office stress may also reduce the chance of an acoustic shock. Proper use of the headset and preventing mobile phones from being used in call centers reduces the chance of feedback.
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There are many methods of attempting to reduce the risk of AS. Several devices attempt to remove potentially harmful sound signals by digital signal processing. None has yet been shown to be fully effective. Devices which solely limit noise levels to about 85 dB have been shown in field trials
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Londero A, Charpentier N, Ponsot D, Fournier P, Pezard L and Noreña AJ (2017) A Case of
Acoustic Shock with Post-trauma Trigeminal-Autonomic Activation. Front. Neurol. 8:420. doi: 10.3389/fneur.2017.00420
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employees with depression, headaches and other health problems demanded compensation for injury sustained from acoustic shock at work. BT has already paid £90,000 to one worker who had tinnitus.
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Patuzzi R, Milhinch J, Doyle J. Acute aural trauma in users of telephone headsets and handsets. Neuro-Otological
Society of Australia Annual Conference, Melbourne, 2000 (personal communication).
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ITU-T Recommendation p.10 (12/98): Vocabulary of terms on telephone transmission quality and telephone sets, Geneva, 1998.
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Westcott M. Acoustic shock injury (ASI). Acta
Otolaryngol Suppl. 2006 Dec;(556):54-8. Review.
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It has been suggested that the tensor tympani is involved in causing the disorder (see
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for acoustic shock caused by excessive noise during orchestral rehearsals.
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and call centre employees are thought to be most at risk.
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a person may experience after hearing an unexpected, loud
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302:"Musician wins landmark ruling over ruined hearing"
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16:Negative symptoms in response to loud noise
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218:The Journal of Laryngology & Otology
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193:"HSE - Noise: Acoustic shock"
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104:tonic tensor tympani syndrome
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181:Appendix 7 – Acoustic shock
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224:: S2–S9.
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306:BBC News
286:BBC News
240:24565111
163:Archived
91:tinnitus
83:Headache
36:feedback
24:symptoms
87:fatigue
79:anxiety
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75:nausea
348:H93.2
71:shock
28:sound
236:PMID
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