Acoustic characteristic correction method, acoustic characteristic correction device
A technology of acoustic characteristics and correction methods, applied in frequency/direction characteristic devices, measurement devices, frequency response correction, etc., can solve the problems of increased interaction and cycle times, and decreased processing speed, so as to reduce processing burden, improve reproducibility, The effect of reducing the influence of noise
Active Publication Date: 2020-06-16
HONDA MOTOR CO LTD
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Problems solved by technology
When performing FFT processing, it is known that the reduction in loop size can be achieved by performing repeated processing, but on the contrary, there is a problem that the processing speed decreases due to the interaction between the memory parts and the increase in the number of loops.
Method used
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Embodiment Construction
[0037] (Constitution involved in acoustic characteristic correction).
[0038] figure 1 The acoustic control device 1 shown in is used to correct the acoustic properties of a vehicle inspection device 2 . The acoustic control device 1 includes a speech output device 10 , a signal separation element 11 , a first signal storage unit 121 , a second signal storage unit 122 , a signal calculation unit 14 , and a correction value calculation unit 18 . The element 11, the element 14, and the element 18 are constituted by a processor or a processor core (hardware) that executes software and arithmetic processing corresponding to the software, respectively. In the acoustic control device 1 , some or all of the elements 10 , 11 , 121 , 122 , 14 , and 18 may be components of the vehicle inspection device 2 .
[0039]The speech output device 10 is constituted by a speaker, and outputs an acoustic signal by vibrating a vibrating plate (vibration element). The signal separation element 1...
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The invention provides an acoustic characteristic correction method, an acoustic characteristic correction device and an FFT loop. According to the acoustic characteristic correction method of the present invention, it is superior to the prior art in at least any aspect of improving the reproducibility of inspection conditions, reducing the influence of noise on acoustic characteristic correction, and reducing the burden of FFT calculation processing. A reference acoustic signal whose frequency characteristic is known is output from a voice output device (10) and input into a voice input device (20) of a vehicle inspection device (2). The frequency response characteristic of the voice input device (20) is detected by performing FFT operation processing on an input signal input to the voice input device (20) after performing A / D conversion. The correction factor for each frequency is determined by comparing the frequency response characteristics of the voice input device (20) with the frequency characteristics of the reference acoustic signal. The frequency response characteristic of the voice input device (20) is corrected based on the correction factor.
Description
technical field [0001] The present invention relates to a method and a device for correcting the acoustic characteristics of a device with an acoustic inspection function, and an FFT loop. Background technique [0002] For example, in the final inspection process of a vehicle equipped with more than hundreds of ECUs (electronic control units), in order to distinguish or diagnose the normal or abnormal functions of each ECU and each instrument electrically connected to the ECU, a Vehicle inspection device (LET (Line End Tester)). [0003] Since the vehicle inspection device is equipped with a microphone for checking the normality of the sound emitted by each acoustic instrument of the vehicle, the acoustic characteristics or sensitivity characteristics are confirmed using a reference sound whose acoustic characteristics have been measured in advance. Specifically, a reference sound is input into a loudspeaker, its sensitivity is measured, and the deviation value of the measu...
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IPC IPC(8): H04R3/04H04R29/00
CPCH04R3/04H04R29/001H04R29/004H04R2430/03H04R2499/11H04R2499/13G01R35/00G01R23/16G01R23/15H04R1/40H04R3/002H04R3/005H04R29/002H04R29/006
Inventor 篠塚典之菅原佑太
Owner HONDA MOTOR CO LTD