Solutions to Common Faults of Noise Meter and Maintenance of Noise Meter
1. There is no display on the display
(1) The internal battery connection is disconnected or the battery contact is not good: solder the connection and replace the battery contact piece.
(2) The battery is damaged: replace the battery.
2. The measurement reading is obviously low or the calibration is less than 94.0dB.
(1) Microphone sensitivity is too low or damaged: replace the microphone and recalibrate.
(2) The contacts of the preamplifier are not in good contact with the microphone: clean the contacts.
(3) The plug of the preamplifier is not in good contact with the host socket: replace the plug socket.
3. The reading is too high during low sound level measurement, and the ground wire of the preamplifier is not in good contact: tighten the outer sleeve.
With the increasingly prominent environmental problems, the prevention and control of noise pollution has also been put on the agenda, so a series of noise meters came into being.
But I believe that many people still don't know its working principle, and some people even doubt the effectiveness of the digital noise meter, so let's start with the characteristics of its process technology.
Main technical indicators of digital noise meter:
The calculation method complies with the requirements of "Calculation Method for Attenuation of Outdoor Sound Propagation" (ISO 9613-2:1996) and "Technical Guidelines for Environmental Impact Assessment Acoustic Environment" (HJ 2.4-2009), considering sound diffraction, reflection and refraction algorithms; The noise prediction accuracy in the direct sound area is not less than 3 dB(A).
Principle of digital sound level meter:
It is the most basic and most commonly used instrument in acoustic measurement, and is widely used to measure the sound pressure level or sound level of sound.
The digital sound level meter adds digital digital functions on the basis of ordinary sound level meters, making the operation easier and more convenient.
It is not only used in acoustic and electroacoustic measurement, but also has been widely used in various fields such as machine manufacturing, architectural design, transportation, environmental protection, medical and health, and national defense engineering, and has become a must-have acoustic measuring instrument for almost all departments.
Technical features of digital sound level meter:
Comprehensive computer simulation, database technology, Internet of Things, cloud computing, etc., relying on scientific acoustic prediction models to realize 3D visualization of noise map drawing;
Accurately predict the trend of environmental noise changes in the region, control the quality of the acoustic environment, and provide strong support for environmental noise management.
