Effectiveness of Directional Microphones and Noise Reduction Schemes in Hearing Aids: A Systematic Review of the Evidence

Journal of the American Academy of Audiology

Bentler, R. A. (2005).

Journal of the American Academy of Audiology, 16(7), 473-484.

This systematic review investigates the effectiveness of directional microphones and noise reduction schemes in hearing aids for adults who are deaf or hard of hearing.

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Randomized controlled trials; nonrandomized intervention studies; descriptive studies

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<div>The review found the following: </div><ul> <li>Directional microphones offer additional advantage over amplification and is optimized by both a user-controlled switch and training regarding environment-specific use.</li> <li>Noise reduction demonstrated a "modest inclination" toward listening effort (p. 482). </li></ul>