Method for testing performance of automobile audio device
A technology for car audio and test methods, applied in the direction of electrical components, etc., can solve the problems of not fully representing sound preference, sound orientation formula, impact assessment authenticity and accuracy, etc.
Inactive Publication Date: 2014-05-21
SAIC MOTOR
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Problems solved by technology
Some manufacturers mainly rely on the subjective listening method to adjust and evaluate the vehicle audio. The disadvantage of this method is that subjective evaluation is often subjective, and it is easy to cause stereotypes of sound orientation, which cannot fully represent all age groups or The voice preferences of various consumer groups; in addition, subjective evaluation is closely related to the psychological factors of the evaluator and the external environmental factors of the evaluation, making the evaluation results easily disturbed by psychological and environmental factors, thus affecting the authenticity and accuracy of the evaluation
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[0033] Hereinafter, the present invention will be specifically described based on the drawings showing the embodiments of the present invention.
[0034] In the actual test application of car audio performance, the following factors need to be considered: test environment, type of test equipment, location of sound signal acquisition device inside the car, type of test signal, type of test item, test Steps and the output form of test results, etc. This is further described below.
[0035] In one embodiment of the present invention, in order to match with the actual working environment of the automobile, the temperature of the test environment is set between 5°C and 35°C, the relative humidity is set between 25% and 75%, and the standard air pressure It is set between 86 kPa and 106 kPa, and the allowable ambient temperature variation during the test is kept within ±2°C. In addition, ambient noise is controlled at least 10 dB below the sound pressure level of the signal ...
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The invention relates to automobile electronic technology and in particular to a method for objectively testing the performance of an automobile audio device. The method of the invention comprises following steps of: installing a manmade head at an assigned position inside the automobile, wherein the manmade head is configured as a part simulating the structure of double ears of an adult and an embedded microphone used for acquiring sound signals is installed inside manmade head; turning off the audio setting of a player in order to maintain the player in a straight state; enabling the player to play a pink noise signal with set volume and making a loudspeaker in an assigned excited state; and recording and outputting the sound signal to an external analyzing device by using the microphone.
Description
technical field [0001] The invention relates to automobile electronic technology, in particular to an objective test method for automobile audio performance. Background technique [0002] Car stereos usually include a player (such as a CD player or DVD navigation unit) and speakers. At present, the adjustment and evaluation of car audio performance are generally based on subjective and objective methods. Some manufacturers mainly rely on the subjective listening method to adjust and evaluate the vehicle audio. The disadvantage of this method is that subjective evaluation is often subjective, and it is easy to cause stereotypes of sound orientation, which cannot fully represent all age groups or The voice preferences of various consumer groups; in addition, subjective evaluation is closely related to the psychological factors of the evaluator and the external environmental factors of the evaluation, making the evaluation results easily interfered by psychological and environ...
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Inventor王赟
OwnerSAIC MOTOR