To ensure the purchase of a sound level meter with good quality, you should check from these places
Sound level meter, also called noise meter, is an instrument used to measure the sound pressure level or sound level of sound. It is the most basic and most durable instrument in acoustic measurement. With the improvement of the level, the comprehensive development of noise survey and environmental protection application, the machine manufacturing industry has regarded noise as one of the important quality indicators of products. Buildings such as auditoriums and gymnasiums not only require beautiful appearance, but also pursue sound effects. The use of level gauges is becoming more and more widespread.
Several factors affecting the selection of sound level meters
The sound level meter is mainly used to measure noise, and the classification of noise measurement is as follows:
1. From the time characteristics of the sound source or sound field, it can be divided into steady-state noise measurement and unsteady-state noise measurement. Non-stationary noise can be further divided into periodically changing noise, irregularly changing noise and impulsive sound.
2. From the measurement object, it can be divided into the measurement of the characteristics of the environmental noise (sound field) and the measurement of the characteristics of the sound source.
3. From the accuracy of measurement requirements, it can be divided into precision measurement, engineering measurement and noise survey.
4. From the frequency characteristics of the sound source or sound field, it can be divided into broadband noise, narrowband noise and noise containing prominent pure tone components.
Noise real-time monitoring, monitoring data is representative
The noise monitoring system can monitor the noise in real time, and the data is highly representative and can reflect the real level of the noise.
Save manpower and material resources, easy to use
The digital noise meter uses an embedded computer to process all the data, and directly outputs the A-weighted decibel value. As long as it is plugged in, it can automatically start collecting, analyzing, calculating and outputting the data.
This not only greatly reduces the development cycle, but also facilitates the management department to keep abreast of the noise situation, conduct further analysis and take timely response measures.
excellent linearity
The DC output of the traditional noise meter uses the method of compressing the AC signal to obtain the decibel level of the noise signal, which has poor linearity, and the sensitivity coefficient of the compressed signal is not fixed, the linearity is high, and the sensitivity coefficient is consistent.
Classification of Noise Meter
From the measurement object, it can be divided into the characteristic measurement of environmental noise (sound field) and the measurement of sound source characteristics.
From the time characteristics of the sound source or sound field, it can be divided into steady-state noise measurement and unsteady-state noise measurement. Non-stationary noise can be divided into periodic noise, irregular noise and pulse sound.
From the frequency characteristics of the sound source or sound field, it can be divided into broadband noise, narrowband noise and noise containing prominent pure tone components.
From the accuracy of measurement requirements, it can be divided into precision measurement, engineering measurement and noise census.
