Digital Sound Meter

A digital sound level meter is used to measure acoustics (sound emitted through the air). The sound level meter is usually manually with a microphone. The microphone diaphragm responds to changes in air pressure caused by sound waves. This is why this device is sometimes referred to as a sound pressure gauge (SPL) meter. This movement of the diaphragm, ie the deviation of sound pressure (Pascal Pa), is converted into an electrical signal (voltage V).

A microphone with the amount of voltage generated is proportional to the volume when a certain amount of sound is applied. Of course, this factor can be considered the sensitivity of the microphone. For the sound level meter, the sensitivity of the microphone used must be defined. Using this information, the device is able to accurately convert the electrical signal into sound pressure and shows the sound pressure level, ie decibels (DB SPL).