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.

Method: 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.

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http://dx.doi.org/10.1017/S0022215109992167DOI Listing

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