Sound Level Meters and Analyzers

Sound level meters and analyzers by Brüel & Kjær are class 1 sound measurement instruments with unrivalled ease-of-use and flexibility. In fact, the latest generation of our sound measuring instruments can be directly operated with a smartphone. With the addition of our specialized apps and post-processing software, you can set up and customize your instrument for an extensive range of measurements, advanced analysis and reporting. It's been over 60 years since Brüel & Kjær invented the world's first transistorized, hand-held sound level meter, and we still lead the industry today. It's been over 60 years since Brüel & Kjær invented the world's first portable sound level meter, and we still lead the industry today.

What is a Sound Level Meter

HBK 2255 Sound Level Meter

HBK 2255 is our latest sound level meter. An advanced and flexible sound level meter, HBK 2255 is ready for any sound measurement task from environmental noise assessments to sound insulation testing.

Slm 2250 - building acoustics

Guide to Buying a Sound Level Meter BUYERS GUIDE


A sound level meter is a measuring instrument, designed to measure sound levels in a standardized way.

Commonly referred to as a sound meter, noise meter, decibel meter, or sound pressure level (SPL) meter, a sound level meter is designed to respond to sound in approximately the same way as the human ear.

The purpose of a sound level meter is to give objective, reproducible measurements of sound pressure levels (SPL).


At its very core, a sound level meter basically consists of a microphone, a preamplifier, a signal processing unit, and a display.

The most suitable type of microphone for a sound level meter is a condenser microphone, which combines precision with measurement reliability. The microphone converts the sound signal to an equivalent electrical signal. The electrical signal produced by the microphone is at a very low level and must be enhanced by a preamplifier, before reaching the main processor.

Signal processing applies frequency weightings and time weightings to the signal, as specified by international standards such as IEC 61672 – 1, which a sound level meter complies with.


Sound level meters and analyzers are used to measure and manage noise from a variety of sources. They are often employed in environmental noise assessment from sound sources, such as industrial plants, road and rail traffic, and construction work.

In urban environments, noise pollution - or excessive noise exposure - directly affects the people who live and work in the affected areas. To ensure noise regulations are followed, noise is measured from a variety of sources as sports events, outdoor concerts, parks, and residential- or commercial neighbours. Each sound/noise source is defined by its own set of characteristics, which can pose challenges for the professionals assessing them.

Measurement applications