What are the classifications of sound level meters?
The sound level meter is the most basic instrument for measuring noise. It is an electronic instrument. The sound level meter generally consists of a condenser microphone, a preamplifier, an attenuator, an amplifier, a frequency weighting network, and an effective value indicator meter. Sound level meters can be divided into two categories according to their sensitivity, one is ordinary sound level meters; the other is precision sound level meters. According to their uses, sound level meters can also be divided into two categories: one is used to measure stability. State noise; one type is used to measure unstable noise and impulse noise.
The sound level meter adopts advanced digital detection technology, which greatly improves the stability and reliability of the instrument. The sound level meter has the advantages of simple operation and convenient use; it has the characteristics of large dynamic range, large-screen LCD digital display, automatic measurement and storage of various data, etc.
Sound level meters can be widely used in industrial noise measurement and environmental noise measurement of various machines, vehicles, ships, electrical appliances, etc., and are suitable for factories and enterprises, architectural design, environmental protection, labor health, transportation, teaching, medical and health, scientific research and other departments. The field of acoustic testing.
Some common sense about sound level meter selection:
There are two levels of sound level meters. Many people don't understand what they mean. To sum up, the accuracy is different. The accuracy of level one is 0.7 decibels, while the accuracy of level two is 1 decibel. There is not much difference, but from the basic national standard , of course, the first level is representative, so for third parties or government agencies, buy a first level sound level meter directly. Secondly, according to the function, there are ordinary, integral, pulse and spectrum. How to distinguish and recommend this? Ordinary The one that directly reads instantaneously, the one that integrates means that there is an average value over a period of time, the pulse is simpler, you can understand that there is the one with the highest frequency of noise in a period of time, and the spectrum can understand that there is a normal curve The pictures are for research, and professional recommendations are needed in the selection. Different units, different people, different industries, and different environments use different instruments. For example, third parties use first-class Aihua instruments, coal mines use explosion-proof mine safety instruments, etc.
