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SonyGranted patentAudio & voiceInterest 4/10

Sony patents method to calibrate multi-driver speakers using internal mic

Sony has been granted a patent for a signal processing device that calibrates audio systems with multiple speakers. The system plays specific sound patterns through different drivers, listens to the result with a microphone, and calculates how each individual speaker performs across different frequencies.

Why it mattersThis technology helps ensure that complex speaker systems, like those in high-end headphones or soundbars, produce balanced sound by automatically adjusting for how each component behaves.

In the filing’s own words

A signal processing device according to the disclosed technology includes an output control section, a frequency analysis section, and a frequency response compilation section. The output control section causes multiple audio output drivers disposed in an audio output device to generate multiple audio outputs with different combinations of output frequency bands of sound signals that are to be outputted respectively from the audio output drivers. The frequency analysis section makes a frequency analysis of a collected-sound signal upon generation of each of the multiple audio outputs, and obtains the frequency response of each of the multiple audio outputs. The frequency response compilation section compiles the frequency response of each of the audio output drivers from the frequency response of each of the audio outputs that is obtained by the frequency analysis section.

What exactly they claim (claim 1)

1. A signal processing device comprising: an output control section that causes multiple audio output drivers disposed in an audio output device to generate multiple audio outputs with different combinations of output frequency bands of sound signals that are to be outputted respectively from the audio output drivers; a frequency analysis section that makes a frequency analysis of a collected-sound signal upon generation of each of the multiple audio outputs, and obtains a frequency response of each of the multiple audio outputs; and a frequency response compilation section that compiles the frequency response of each of the audio output drivers from the frequency response of each of the multiple audio outputs that is obtained by the frequency analysis section.

Facts

Company
Sony (SONY GROUP CORPORATION)
Official title
Signal processing device, audio output device, and signal processing method
Patent number
US12737151B2
Application number
18848204
Filed
Feb 24, 2023
Granted
Sep 15, 2026
Inventors
3
Claims
15

Classified under

G06F 3/162 Physics & computing
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.