Test method for car audio performance
A car audio and test method technology, applied in the direction of electrical components, etc., can solve the problems that the evaluation results are easily disturbed by psychological and environmental factors, cannot fully represent the sound preference, and the stereotype of the sound orientation
Inactive Publication Date: 2017-11-03
SAIC MOTOR
View PDF6 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[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 86kPa and 106kPa, and the allowable ambient temperature variation value during the test is kept within ±2°C. In addition, the ambient noise is controlled at least 10dB below the sound pressure level of the signal...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to automobile electronic technology, in particular to an objective test method for automobile audio performance. According to the method of the present invention, the method comprises the following steps: the artificial head is installed at a set position inside the car, the artificial head is provided with parts simulating the adult's binaural structure, and a built-in microphone for collecting sound signals is installed inside; Turn off the audio setting of the player to keep it in a straight-through state; make the player play a pink noise sound signal at a set volume, and make the speaker in a specified excitation state; utilize the microphone to record the sound signal and Output to external analysis equipment.
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 machine) 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 envi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04R29/00
Inventor 王赟
Owner SAIC MOTOR