Solutions to the most common problems encountered with noise meters
Nowadays, whether in life or work, it is inevitable that there is a lot of noise. The generation of noise affects our life and work. Noise meters are mainly used to measure environmental noise, do noise engineering, quality control and health prevention.
Noise meters generally consist of condenser microphones, preamplifiers, attenuators, amplifiers, frequency meter networks and effective value indicating meters. Common faults of noise meters generally include the following problems:
1. No display on the monitor
(1) The internal battery connection is disconnected or the battery contact is poor: solder the connection and replace the battery contact piece.
(2) Battery is damaged: Replace the battery.
2. The measurement reading is obviously low or the calibration is less than 94.0dB.
(1) The microphone sensitivity is too low or damaged: Replace the microphone and recalibrate it.
(2) The contacts of the preamplifier are not in good contact with the microphone: clean the contacts.
(3) The preamplifier plug is not in good contact with the host socket: replace the plug socket.
3. The reading is too high when measuring low sound levels, and the ground wire of the preamplifier is in poor contact: tighten the outer sleeve.
The composition and working principle of the noise analyzer
Noise analyzer, also known as noise meter (noise meter, sound level meter) is the most basic instrument in noise measurement. A sound level meter generally consists of a condenser microphone, a preamplifier, a noise meter picture attenuator, an amplifier, a frequency meter network, and an effective value indicator meter.
The working principle of the sound level meter is: the microphone converts the sound into an electrical signal, and then the preamplifier converts the impedance to match the microphone and the attenuator. The amplifier adds the output signal to the network, and then amplifies the signal to a certain amplitude through the attenuator and amplifier, and sends it to the effective value detector.
