| 摘要 |
In the case of an electro-acoustic apparatus ( 1 ) having a housing ( 2 ) with a housing wall ( 9 ) and having an electro-acoustic transducer ( 17 ) that is arranged facing the housing wall ( 9 ), a front chamber volume ( 31 ) that forms an acoustic spring is provided between the transducer ( 17 ) and the housing wall ( 9 ), and in the housing wall ( 9 ) a sound outlet aperture ( 14, 15 ) that preferably forms an acoustic mass is provided, wherein between the front chamber volume ( 31 ) and the sound outlet aperture ( 14, 15 ) a sound guide channel ( 38, 39 ) is provided, which forms a sufficiently large acoustic mass in order jointly with the front chamber volume ( 31 ) to achieve a satisfactory band-pass characteristic of the sound pressure frequency response of the transducer ( 17 ).
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