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MarkeTrak VI: Hearing Aid Industry Market Tracking Survey 1984-2000

Method . National family opinion panel80,000 households Balanced to key census variablesHIA survey in 1984 used NFOAll MarkeTrak surveysScreening Question ? Phase I (November 2000)?Does anyone in your household have a hearing difficulty in one or both ears without the use of a hearing aid?"Ph

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MarkeTrak VI: Hearing Aid Industry Market Tracking Survey 1984-2000

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