For reliable measurements of acoustic noise, ATEC has a sound level meter rental to meet any need from a range leading manufacturers like Bruel & Kjaer, Fluke, and Larson Davis.
The sound level meter is a device that measures noise and collects acoustic measurements. Usually a handheld instrument, sound level meters have a microphone to pick up the sound that travels through the air. The microphone will often use a preamplifier to better register how the air pressure changes due to the sound waves. The noise is then converted into an electrical signal where the sound level meter evaluates and produces an analysis of the noise on an LCD display.
While cost and availability are important, the right sound level meter rental can depend on a variety of other characteristics:
When testing with a sound level meter rental, the device will produce a series of measurements to detail the surrounding acoustics. An SLM uses decibels (dB) to present the noise in a given area, although there are many ways to define that measurement.
In environments where noise levels are changing constantly, the device measures for Leq or the Equivalent Continuous Sound Level. If the decibels rise and fall as the noise is collected, the sound level meter determines the average sound level over that period.
To meet certain test standards like IEC 61672 and ANSI S1.4, sound level meters will also measure for time and frequency weighting.
The human ear reacts differently to sound based on frequency, so the sound level meter measures for those frequencies. The most common frequency measurement is for A-weighting, presented as LAeq. A-weighting tests for sounds at medium-range levels, so LAeq measurements are often used in workplaces and similar environments. The devices can also check for C-weighted (lower) and Z-weighted (flat) frequencies.
Modern sound level meters often have 3 options for time-weighting to meet international test standards: