The motor is tested in the anechoic chamber to obtain accurate acoustic data and evaluate its noise performance. The following are detailed testing steps and precautions:
 
1、 Preparation before testing
 
1. Choose a suitable anechoic chamber: Select a suitable anechoic chamber based on the size of the motor and testing requirements. The anechoic chamber should comply with acoustic design standards, provide free field conditions, and reduce external noise and vibration interference.
2. Check the status of the anechoic chamber: Ensure that the interior of the anechoic chamber is clean and tidy, with no obvious sources of noise or vibration. Check if the doors, ventilation openings, and other parts of the anechoic chamber are tight to avoid leakage of external noise.
3. Prepare testing equipment: Prepare sound level meters, microphones, data acquisition systems, and other testing equipment. Ensure that all equipment is in good working condition and calibrated.
 
2、 Testing process
 
1. Place the motor: Place the motor to be tested in the center of the anechoic chamber. If the motor is heavy or has a large volume, a specialized support frame or platform can be used to secure the motor and ensure its stability.
2. Arrange the microphone: According to the testing standards and requirements, arrange the position of the microphone reasonably. Normally, the microphone should be placed at a certain distance from the motor in order to capture accurate sound pressure values. You can use a tripod or specialized bracket to secure the microphone and ensure its stable position.
3. Startup test: Start the motor and put it into normal working condition. Simultaneously activate the sound level meter and data acquisition system to start collecting noise data. During the testing process, the soundproof room should be kept quiet to avoid interference from other noise sources.
4. Data recording and processing: Real time recording of test data and necessary processing and analysis. Computer software can be used to assist in data processing, generating noise spectrograms, sound pressure level curves, and other charts to more intuitively evaluate the noise performance of motors.
 
3、 Precautions after testing
 
1. Turn off the device: After the test is completed, first turn off the motor and testing equipment. Ensure that all devices are safely turned off to avoid accidental damage.
2. Organize the testing site: Clean up the debris in the anechoic chamber and restore its original appearance. Check for any missing items to ensure the cleanliness and safety of the anechoic chamber.
3. Data saving and analysis: Save the test data to the computer for further analysis and processing. The test results can be compared with the standard values to evaluate whether the noise performance of the motor meets the requirements.
 
4、 Summary
 
Testing motors in anechoic chambers is a complex task that requires strict adherence to standards and requirements. Through a reasonable testing plan and rigorous operating procedures, accurate acoustic data can be obtained, providing scientific basis for the evaluation of motor noise performance. During the testing process, attention should be paid to maintaining the quietness and stability of the anechoic chamber, avoiding interference from external noise and vibration, to ensure the accuracy and reliability of the test results.