Actively - directional speaker for the treatment of a hearing-impaired person zone and a method for automatically adjusting the reproduction volume of a hearing-impaired person according to a zone associated directional speaker

摘要

Actively - directional speaker for the treatment of a hearing-impaired person zone, with a housing (1), at least one arranged in the housing (1) loudspeaker chassis (2), a power amplifier (9) and bundling degree [γ] of at least 3,5 in the frequency range from 300 to 5000 hz, and at least one microphone (7), characterized in that the housing (1) a plurality of sound openings which are uniformly distributed over the circumference; the at least one microphone (7) at a point in or on the housing (1) is arranged, where a minimum of the radiated sound pressure, or the emitted sound pressure a maximum of 10 db deviates from this minimum, and an evaluation unit (8) is provided, which is constructed so that it is provided with a the power amplifier (9) supplied useful signal with a microphone signal of the at least one microphone (7) compares, from this comparison, a control variable is derived, the essentially from the ambient noise of the hearing-impaired person zone by means of this controlled variable and depends on the volume of the actively - directional loud speaker in the zone of the hearing-impaired person regulates.