Measuring loudspeaker nonlinearity and asymmetry
US11272301B2 · kind B2 · utility
1Cited by
2References
18Claims
0Family size
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Key dates
| Filing date | Jan 10, 2020 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Jan 10, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Loudspeaker parameters are measured separately for various forward and rearward cone displacements, using a test signal that permits measurement of parameters at various degrees of either forward or rearward cone movement. The test signal uses a brief frequency sweep signal such as a logarithmic sweep signal, in combination with a very low frequency (VLF) audio tone having a fundamental frequency below, e.g., 10 Hz. The very low frequency audio tone may have a sine wave shape, a square wave shape or a clipped sine wave shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.