| 摘要 |
<p>A method and apparatus for reducing distortion of an acoustical waveform produced by an acoustical output assembly or transducer, which could be an in-the-ear hearing aid. The transducer (11-14) is located within a composite which interacts with interfering waveforms. The composite comprises a plurality of microspheres (4) located within a polymeric matrix (2, 10). The microspheres can be selected from a group consisting of ceramic, glass, mineral and phenolic resins. The microspheres also have a mean diameter in the range of 5 to 5000 microns and can comprise 5 to 75 volume percent of the total composite. The polymeric matrix is selected from a group consisting of silicones, polyvinyls, acrylics, polyolefins, polyamides, polyesters and polyurethanes. The composite surrounding the acoustical output assembly can be shaped in the form of the transducer or output assembly and can be formed by injection molding or a slurry mixture.</p> |
