Sound Level Meter / Noise Level Meter

Sound level meter instruments and analyzers by Brüel & Kjær are designed for class 1 sound measurement, ease-of-use, and unrivaled flexibility. In fact, the latest generation of our sound level meters can be directly operated via smartphones, and with the addition of our specialized apps and processing software, our sound level meters provide the ideal measurement solution. 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.

B&K 2245 Sound level Meter With Noise Partner

A complete class 1 sound / noise measuring solution for dedicated measurement applications. B&K 2245 is designed with task-tailored Noise Patrol Apps for specific measurement applications, providing you with the tools you need to get your job done.

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Class 1 Sound Level Meter

B&K Type 2250 Or Type 2270 - Single or Dual Channel Measurements

With an award‐winning design and interface based on extensive research among technicians, engineers and consultants, our Type 2250 and Type 2270, come equipped to handle the most demanding measurement tasks.

While Type 2250 is a single-channel instrument, Type 2270 provides you with two channels for simultaneous class 1 sound measurement.

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 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).


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 neighbors. Each sound/noise source is defined by its own set of characteristics, which can pose challenges for the professionals assessing them.

Listed below are articles describing the most common applications:


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. 
The signal can also be available at output sockets in either AC or DC charge. The sockets are typically used in connection to external instruments or to connect with data acquisition systems to provide a record for further processing.