Calibration method and system of solid sound sensitive acceleration sensor and correction method of measurement signal of solid sound sensitive acceleration sensor

An acceleration sensor and a technology for measuring signals, which are used in the field of calibrating the measurement signal of a solid-borne sound-sensitive acceleration sensor, a system for calibrating a solid-borne sound-sensitive accelerometer, and the field of calibrating a solid-borne sound-sensitive accelerometer, which can solve problems such as performance fluctuations

Pending Publication Date: 2022-08-02
ROBERT BOSCH GMBH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The performance of algorithms for speech processing or active noise reduction can fluctuate due to fluctuating transfer functions

Method used

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  • Calibration method and system of solid sound sensitive acceleration sensor and correction method of measurement signal of solid sound sensitive acceleration sensor
  • Calibration method and system of solid sound sensitive acceleration sensor and correction method of measurement signal of solid sound sensitive acceleration sensor
  • Calibration method and system of solid sound sensitive acceleration sensor and correction method of measurement signal of solid sound sensitive acceleration sensor

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Embodiment Construction

[0036] figure 1 A schematic block diagram of a system 1 for calibrating a structure-borne sound-sensitive acceleration sensor 4 is shown. During the calibration process, the structure-borne sound-sensitive accelerometer is located in a defined position on the user's body. For example, the solid-borne sound-sensitive acceleration sensor 4 is integrated into an earphone that is worn by the user during calibration.

[0037] The system 1 includes a microphone 2, which can be integrated into a smartphone, for example. However, the microphone 2 and the structure-borne sound-sensitive acceleration sensor 4 can also be integrated into the same device, for example into a headset with microphone function.

[0038] The microphone 2 is preferably configured for detecting frequencies in the frequency domain that are sufficiently large, preferably greater than 2.5 kHz.

[0039] The microphone 2 is synchronized with the acceleration sensor 4 . When the acceleration sensor 4 detects the a...

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Abstract

The invention relates to a method for calibrating a solid-borne sound-sensitive acceleration sensor by means of at least one microphone. For this purpose, the acceleration sensor is arranged in a defined position on the body of the user. In addition, at least one acceleration sensor signal and at least one microphone signal are detected, the at least one acceleration sensor signal and the at least one microphone signal being synchronized and caused by the sound of the user. A frequency analysis is performed on the acceleration sensor signal and a frequency analysis is performed on the microphone signal. A frequency-dependent correction function for correcting a transfer function of the acceleration sensor is determined on the basis of a frequency analysis of the acceleration sensor signal and of the microphone signal.

Description

technical field [0001] The invention relates to a method for calibrating a structure-borne sound-sensitive acceleration sensor and a system for calibrating a structure-borne sound-sensitive acceleration sensor. The invention furthermore relates to a method for correcting a measurement signal of a structure-borne sound-sensitive acceleration sensor. In particular, the present invention relates to a structure-borne sound-sensitive acceleration sensor that is worn on a user's head, in particular in earphones. Background technique [0002] In-ear headphones, or earphones, are worn directly in the ear and are typically wirelessly connected to portable devices (eg, smartphones, smart watches, etc.). Sensors can be integrated into in-ear headphones. For example, a microphone may be provided that detects the user's voice signal. In addition, inertial sensors may be provided, which detect user interaction with the in-ear headphones. For example, an acceleration sensor may be prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01H11/06
CPCG01H17/00G01H11/06H04R1/1075H04R29/004H04R1/1083H04R2460/13G06F3/012
Inventor C·马沙尔A·叶米利S·沙伊尔曼
Owner ROBERT BOSCH GMBH
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