| 摘要 |
The invention relates to a horn comprising a one-piece body which is preferably made from an injected plastic material. The aforementioned body defines a cylindrical tube ( 1 ) forming the acoustic chamber, the free end ( 1 ') of which is flared. In addition, the tube ( 1 ) is surrounded by a coaxial wall ( 6 ) having a semi-spherical or similar configuration, which forms a pressure chamber ( 7 ) with a corresponding blow tube ( 8 ). According to the invention, the periphery of a vibrating sheet ( 9 ) is fixed to the mouth of the wall ( 6 ) by means of heat sealing. The vibrating sheet, which is made from laminated aluminium, adopts a curved configuration such as to be housed in the end of the tube ( 1 ) forming the acoustic chamber ( 5 ), said end extending slightly beyond the mouth of the wall ( 6 ) forming the pressure chamber ( 7 ).
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