BAIJIAN - Third party testing organization
The standard use of noise is noise. From a physiological perspective、 any sound that interferes with people's rest、 study、 and work、 as well as the sound that people want to hear、 that is、 unwanted sound、 is collectively referred to as noise. When noise has a negative impact on people and the surrounding environment、 it forms noise pollution. In physics、 noise refers to all irregular signals (not necessarily sound)、 such as electromagnetic noise、 thermal noise、 radio transmission noise、 laser noise、 fiber optic communication noise、 camera image noise、 etc. Vibration is a universal phenomenon in the universe、 which can be divided into macroscopic vibrations (such as earthquakes and tsunamis) and microscopic vibrations (thermal motion of elementary particles、 Brownian motion). Some vibrations have relatively fixed wavelengths and frequencies、 while others do not have fixed wavelengths and frequencies. Two objects with the same vibration frequency、 one of which can cause the other object to vibrate at the same frequency、 is called resonance. Resonance can bring many benefits and hazards to humans. Different atoms have different vibration frequencies and emit spectra at different frequencies、 so a spectral analyzer can be used to discover which elements a substance contains. At room temperature、 the magnitude of particle vibration determines the form of a substance (solid、 liquid、 and gas). Different substances have different melting points、 freezing points、 and vaporization points、 which are also determined by the different vibration frequencies of particles. The temperature we usually refer to is the vibration amplitude of air particles. Any vibration requires an energy source、 and without an energy source、 vibration will not occur. The absolute zero specified by physics is the temperature at which even elementary particles cannot produce vibrations、 and it is also the lowest temperature in the universe. The principle of vibration is widely applied in industries such as music、 architecture、 medical treatment、 manufacturing、 building materials、 detection、 military、 etc. There are many small branches、 and in-depth research on any branch can promote the advancement of science and promote social progress
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China