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Speaker excursion prediction and protection

A loudspeaker, maximum excursion technology, applied in sensor protection circuits, sensors, amplifiers, etc., can solve problems such as sound quality degradation and sound distortion

Inactive Publication Date: 2021-08-13
SEMICON COMPONENTS IND LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the suspension supporting the speaker cone can be permanently stretched distorting the sound from the speaker
Excessive movement can also result in poor sound quality or unwanted sound from the speakers

Method used

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  • Speaker excursion prediction and protection
  • Speaker excursion prediction and protection
  • Speaker excursion prediction and protection

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Embodiment Construction

[0017] The present disclosure describes systems and methods for adaptively adjusting audio signals to prevent sound from the speaker from being over (ie, over) offset and damage or distortion. The disclosed method combines low frequency offset protection with transient offset protection (eg, high frequency offset protection). For low frequency offset protection, the method uses the simplification of the offset based on the analysis of the secondary resonant frequency of the audio signal. The disclosed systems and methods can provide an advantageous result of offset protection, and there is no significant audio distortion and low calculation complexity (ie, high computational efficiency). The low calculation complexity can cause the method disclosed in the present invention to be particularly useful in the mobile computing device (e.g., mobile phones, tablets), which is typically battery-driven and tends to have an excessive drive. Offset small speaker. In addition, low-frequency o...

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Abstract

The invention provides speaker excursion prediction and protection. Systems and devices configured by an algorithm to prevent or limit a speaker over-excursion are disclosed. The disclosed algorithm is computationally efficient because it exploits a relationship between an audio signal and a speaker's excursion that exists at low-frequencies, below a self-resonance of a speaker. The disclosed algorithm combines the low-frequency excursion protection with a high-frequency, transient excursion protection. The combined approach allows the transient excursion protection to use a shorter delay than otherwise possible. The shorter delay allows for a compressor to apply attenuation to a transient audio signal before a momentum of the speaker, caused by the transient audio signal, grows too large to be controlled.

Description

[0001] Cross-reference [0002] The present application claims priority to U.S. Patent Application Serial No. 16 / 785, 968, filed on February 10, 2020. Technical field [0003] The present disclosure relates to an audio system, and more particularly to systems and methods for protecting the speakers from over-moving (ie, overbred). Background technique [0004] Audio speaker (ie, speaker) is designed to operate below the maximum offset. (For example, by amplifying or signaling) Drive speaker moves more than its maximum offset. This excessive movement can result in damage or destruction of the speaker. For example, the coil of the speaker can be driven to a position that cannot be controlled, and the coil can be permanently smashed. In addition, the suspension that supports the speaker paper pot can be permanently stretched so that the sound from the speaker is distorted. Excessive movement can also result in deterioration of sound quality or make the speaker unwanted sound. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00H04R9/06
CPCH04R3/00H04R9/06H04R2430/00H04R3/007H04R3/002H03F3/181H03F2200/03H03F2200/435H04R29/001H04R3/04
Inventor J·A·米查姆
Owner SEMICON COMPONENTS IND LLC
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