How does a digital sound level meter work?

The microphone of the sound level meter contains a flexible membrane that moves slightly when the sound waves hit it. Those movements are converted into an AC electrical signal that is a precise electronic picture of the sound waves. Those AC signals are converted to DC by the a root-mean-square (RMS) detector circuit.

How do you calibrate a sound calibrator?

Navigate to the Calibration screen (at this point don’t start the calibration procedure). Carefully place the calibrator over the microphone capsule, ensuring not to twist either your sound meter or the calibrator as this can damage the microphone. Activate the calibrator at the desired tone, which is normally 94dB.

What is acoustic calibration?

A Sound Level Calibrator or Acoustic Calibrator is a hand-held device that emits an audible tone of very accurate level and frequency. Before making noise measurements the Calibrator is fitted over the meter’s microphone and the reading is either checked manually by the user or automatically by the meter.

How do you read a dB meter?

Step 1: Find out the difference between two noise levels and then find the corresponding row in the left-hand column. Step 2: Find the corresponding number in dB in the right-hand column. Step 3: Add the number in the right-hand column to the highest of the two-decibel measurements you have.

How do you use the decibel meter app?

With a free app and your Android phone, you can turn your phone into a noise meter and find out. Download Sound Meter from the Android Market and launch the app. It starts right up to the sound meter and measures the minimum, mean, and maximum ambient sound levels in decibels (dB).

How often should a sound level meter be calibrated?

annually
Calibration of your sound level meter by its manufacturer manufacturer is something I recommended annually. Some regulations (like the 2005 Control of Noise at Work Regulations) state that a sound level meter should be returned every two years and the acoustic calibrator every year.

How do you read a noise level?

To measure decibels, download a mobile decibel-reading app, like Sound Level Meter or Decibel Meter. You can also measure decibels using computer programs like Audacity or Decibel reader. Another option is to use a profession decibel meter, which can give you a very accurate decibel reading.