Worldwide experience with sequential phase-shift sound cancellation treatment of predominant tone tinnitus.
OBJECTIVE
To report clinical data from six centres in the US, Western Europe and Asia which have used phase-shift sound wave cancellation for treatment of predominant tone tinnitus, from the first treatment in 2000 to 2009.


METHODS
Clinical data were obtained from New York City, London, Erie (Pennsylvania, USA), Antwerp, Grottamare (Italy) and Kuala Lumpur, and summarised.


RESULTS
A total of 493 patients were treated. A reduction in tinnitus volume (defined as > or =6 dB) was seen in 49-72 per cent of patients.
Choy
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DS
Tinnitus Control Center, New York, USA.
Lipman
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RA
Tassi
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GP
D000161:Acoustic Stimulation / Q000295:instrumentation / Q000379:methods*; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013016:Sound; D014012:Tinnitus / Q000628:therapy*