Teach you in 1 minute how to choose a high-quality noise meter
Noise meters are used for measuring sound levels of environmental, mechanical, traffic, ship, and other noises; The classification of noise measurement for decibel meters mainly includes the following types:
1. Noise meters can be classified into precision measurement, engineering measurement, and noise survey based on the required measurement accuracy.
2. Noise meters can be classified into steady-state noise measurement and non-stationary noise measurement based on the time characteristics of the sound source or field. Unsteady noise can be divided into periodic variation noise, irregular variation noise, and pulse sound.
3. Noise meters can be classified into broadband noise, narrowband noise, and noise containing prominent pure tone components based on the frequency characteristics of the sound source or field.
4. Noise meters can be classified into precision measurement, engineering measurement, and noise survey based on the required measurement accuracy.
Solutions to common faults in noise meters
A noise meter generally consists of a condenser microphone, preamplifier, attenuator, amplifier, frequency meter network, and effective value indicator head. The common faults of noise meters generally include the following issues:
1. No display on the monitor
(1) Internal battery wiring disconnected or poor battery contact: Weld the wiring and replace the battery contact piece.
(2) Battery damage: Replace the battery.
2. The measurement reading is significantly low or cannot be calibrated to 94.0dB.
(1) The sensitivity of the microphone is too low or damaged: replace the microphone and recalibrate it.
(2) The contact between the preamplifier and the microphone is not good: clean the contact.
(3) The plug of the preamplifier is not in good contact with the host socket: replace the plug socket.
3. The reading is high during low sound level measurement, and the ground contact of the preamplifier is poor: tighten the outer sleeve.
