Various phase canceller strengths are offered under Fitting > Configure Features > Phase Canceller to provide clinicians with the ability to address various degrees of feedback and any possible sound quality concerns. The default setting is 'Moderate' for the Automatic Program and all acoustic manual programs once the feedback optimization test has been performed as this strength has been found to provide the optimal feedback management performance. In those instances where a client reports concerns with the sound quality of tonal signals (e.g., music) or particular environmental sounds, clinicians could adjust the strength of the phase canceller downwards one step at a time to optimize the balance between lack of feedback and lack of sound quality complaints.

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