Acoustic performance test

Where can I go to get a complete solution for acoustic performance testing? BAIJIAN Materials Testing Agency provides acoustic performance testing services. It is a national high-tech enterprise, a third-party materials laboratory, and a CMA qualification certification agency. It is a collectively owned scientific research institution with complete laboratory instruments and scientific research. The team is strong, adhering to the concept of scientific research and dedication, and is engaged in performance testing, non-standard testing, unknown substance detection and identification, industrial problem diagnosis and testing, composition testing, failure testing, corrosion testing, etc. Test reports will be issued in 7-15 working days, supporting 2D The code system checks the authenticity, and multiple laboratory branches across the country support door-to-door sampling/sample delivery testing services nationwide.

Test period: 7-15 working days

Test fee: Initial inspection of samples. After the initial inspection, a quotation will be made based on the customer's testing needs and the complexity of the experiment.

Acoustic performance test scope

Ceramics, mufflers, aerogels, metals, polyimides, etfe membranes, pumps, porous materials, sound-absorbing materials, automotive carpets, stainless steel, acoustic Barrier, steel, elm, acrylic, quartz, etc.

Acoustic performance test items

The following are 20 acoustic performance test items and their brief descriptions:

1. Sound pressure level (SPL): measuring sound Intensity or volume

2. Frequency response: Measure the response ability of the sound system to different frequencies

3. Distortion: Measure the degree of distortion of the sound signal, including harmonic distortion and intermodulation distortion etc.

4. Phase response: measures the response ability of the sound system to phase differences

5. Vacuum tube noise coefficient: measures the noise level in electronic vacuum tube amplifiers

6. Signal-to-noise ratio (SNR): Measures the ratio between signal and noise level

7. Signal-to-noise ratio plus distortion (SNDR): Measures the ratio between signal and noise level in the presence of distortion. Ratio

8. Echo: Measure the interference returned after the sound signal is reflected

9. Internal noise: Measure the noise level generated by the device itself

10. Corner Frequency: Measure the frequency point at which the filter's response to the signal becomes no longer linear

11. Group delay: Measure the delay when the signal passes through the filter

12. Sound quality: Measure the sound The overall experience, including timbre, clarity, balance, etc.

13. Audio signal amplitude response: measuring the response ability of the sound system to changes in signal amplitude

14. Dynamic range: measurement The ability of the device to handle high and low volume signals

15. Harmonic distortion: measuring the ratio of harmonic components in the sound signal

16. Equalizer response: measuring equalizationThe response ability of the device to signals

17. Phase jitter: Measure the changes in phase offset between adjacent samples

18. Intermodulation distortion: Measure the changes caused by mixing multiple signals Distortion problem

19. Noise power spectral density: measuring the power level of noise at different frequencies

20. Peak level: measuring the highest level of the signal.

The above are some common acoustic performance test items used to measure the performance of different types of audio equipment. The selection of specific test items depends on the type, use, accuracy requirements, and test purposes of the equipment.

What does the BAIJIAN test report do? What problems can it help you solve?

1. Sales report. (Sales need to provide third-party testing reports to make their products more unique, let the product data speak for themselves, and make customers more confident in the quality of their products.)

2. Research and development reports. (In the process of developing new products, we encountered some thorny issues about ingredients. We used third-party testing data to find the cause of the problem, solve the problem in a timely manner, shorten the R&D cycle, and reduce R&D costs)

3. Improve products quality. (Discover problems with your own products through comparison of third-party testing data, improve product problems, improve quality, and reduce production costs)

4. Use of scientific research paper data.

Acoustic performance test standards

JG/T 279-2010 Measurement of acoustic performance of building shading products

CB 20113-2014 Measurement of acoustic performance parameters of anechoic tiles Sound tube measurement Method

ASTM E1704-95 (2018 Standard Guide for Acoustic Performance Specifications of Sound Enclosures

TB/T 3051-2002 Technical Requirements and Measurements for Acoustic Performance of Locomotive Bagpipes

ASTM E1704-95(2002 Standard Guide for Specifying the Acoustic Performance of Soundproof Rooms

ASTM E1704-95 Standard Guide for Specifying the Acoustic Performance of Soundproof Rooms

ASTM E1704-95(2010 Standard Standard Guide for Acoustic Performance of Soundproof Rooms

ANSI S12.60-2002 Standards, Design Requirements and Guidelines for School Acoustic Performance

T/CVIA 85-2021 Acoustic Performance Technology for Sound-Emitting Screens for Laser Televisions Specifications

ASTM E1425-91 (1999 Standard Practice for Determination of Acoustic Performance of Exterior Doors and Windows

What are the advantages of BAIJIAN Materials Testing Laboratory?

1. Collective ownership Testing institutions with complete qualifications and scientific, fair and accurate test reports.

2. Multiple laboratory branches spread across the country, supporting door-to-door sampling/sending samples for testing.

3. The testing cycle is short, the testing cost is low, and the experimental plan is more complete.

4. For initial inspection of samples, no testing fees will be charged during the initial inspection.

5. The test report supports scanning the QR code to check the authenticity.

BAIJIAN testing process

1. Send samples. (Communicate with engineers, submit your own testing requirements and send samples to our research institute)

2. Initial inspection samples. (After receiving the sample, conduct a preliminary inspection of the sample and formulate a detailed experimental plan)

3. Quotation. (After the initial inspection, a quotation will be made based on the customer's testing needs and the complexity of the experiment)

4. Both parties confirm, sign a confidentiality agreement, and start the experiment.

5. It takes 7-15 working days to complete the experiment.

6. Mail the test report and provide post-service.

The above is the relevant introduction to acoustic performance testing. If you have other needs, you can consult the laboratory engineer to help you solve it.