A sound level meter (SLM) is a hand-held instrument that measures sound pressure levels (SPL) in decibels, responding to sound much like the human ear.

It’s used to measure and manage noise from factories, construction sites, vehicles, concerts, and workplaces to ensure safety and environmental compliance.

Class 1 meters are more precise and suited for laboratory and environmental monitoring, while Class 2 meters are used for general-purpose or workplace noise assessments.

It uses a microphone to convert sound into an electrical signal, processes it with filters and time settings, and displays the measured sound level in decibels (dB).

Leq represents the average sound energy over a period, giving a single value that reflects fluctuating noise levels.

You should check calibration before and after each measurement session and send it to a certified lab every 12–24 months for verification.

Place the calibrator snugly over the microphone, switch it on (usually 94 dB or 114 dB at 1 kHz), and adjust or verify the reading on the meter.

SLMs are tested and certified under IEC 61672 standards for accuracy and functionality, with Class 1 and Class 2 performance levels.

The SV 973A meets IEC 61672-1:2013 Class 2 standards, ensuring reliable and repeatable results. It offers a measurement range from 25 dB to 129 dB (up to 141 dB Peak) and a frequency range up to 10 kHz, delivering professional-grade accuracy in industrial, environmental, and workplace noise monitoring.

The SV 973A includes a MEMS microphone with lifetime warranty, optional 1/1 and 1/3-octave band analysis, USB connectivity, and data logging capabilities. It also supports Bluetooth® communication, automatic calibration, and advanced noise analysis using Svantek’s PC software.

Yes, the SV 973A is built for demanding acoustic conditions. It performs accurately from –10 °C to +50 °C and up to 90 % humidity, making it ideal for construction, industrial, and environmental noise surveys where fluctuating or high sound levels are present.