Field evaluation of an asymmetric directional microphone fitting.

Laboratory evidence suggests that an asymmetric microphone fitting (omnidirectional processing in one ear and directional processing in the other) can provide a directional advantage in background noise that is as great, or nearly as great, as that provided by binaural directional processing (Bentler et al, 2004). The present study investigated whether the potential benefit of an asymmetric fitting observed in the laboratory extends to real-life listening. Specifically, ease of listening was compared across a variety of real-life listening situations for asymmetric microphone fittings and bilateral omnidirectional processing. These ratings were compared to determine whether the asymmetric fitting provided an advantage in listening situations in which directional microphone processing is generally preferred and/or a disadvantage in listening situations in which omnidirectional microphone processing is generally preferred. Results suggest that an asymmetric fitting may be a viable option for patients who cannot or do not switch microphone modes.