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Subharmonic and Nonharmonic Distortions Generated by High-Frequency Compression Drivers

Acoustical and electrical measurements are made of several commercial high frequency compression drivers with sine wave inputs at various power levels. The results show outputs containing not only the typical levels of upper harmonics, but also subharmonics and nonharmonically related content. These other distortion products are caused by certain modes of vibration of the domed diaphragm assembly. A review of parameter selections for the moving system of a compression driver is given.

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