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EBP Compendium: Summary of Systematic Review

Agence d'Evaluation des Technologies et des Modes d'Intervention en Sante
Efficacy of Directional-Microphone Hearing Aids

Bergeron, F. (2003).
AETMIS, 03-03.

Indicators of Review Quality:

The review addresses a clearly focused question No
Criteria for inclusion of studies are provided No
Search strategy is described in sufficient detail for replication Yes
Included studies are assessed for study quality Yes
Quality assessments are reproducible Yes

Description: This is a systematic review of studies investigating the efficacy of directional hearing aids in individuals with hearing loss.

Question(s) Addressed:

Question not specifically stated.

Population: Not stated

Intervention/Assessment: Directional microphone hearing aids.

Number of Studies Included: 17

Years Included: 1990 - May 2002



Results indicate a positive speech-in-noise benefit for hearing aids with directional microphones. The benefit is maximized in ideal listening situations (in which the noise source is behind the user and the speaker is in front of the user). Evidence suggests that in typical environments (in which noise in non-localized) directional microphones perform comparatively with conventional omnidirectional hearing aids.

Keywords: Directional Microphones, Hearing Aids

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Added to Compendium: December 2011

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