A measurement microphone is a precision acoustic sensor designed to accurately capture sound pressure levels across a wide frequency range. It is commonly used in acoustic testing, NVH analysis, environmental noise measurement, and laboratory research. 

Free-field microphones are optimized for open environments where sound arrives directly from the source, making them ideal for outdoor and anechoic testing.

Pressure-field microphones are designed for enclosed or reflective environments, where sound pressure is uniform, such as cavities, ducts, and near-field measurements. 

An acoustic imaging camera is a device that uses microphone arrays and beamforming technology to visualize sound sources, helping detect leaks, faults, and noise in real time. 

They are widely used for air and gas leak detection, partial discharge identification, mechanical fault diagnosis, and noise source localization in industrial environments. 

A sound level meter is a precision instrument used to measure sound pressure levels (SPL) in decibels (dB). It is widely used for environmental noise monitoring, industrial assessments, and acoustic testing applications. 

Class 1 sound level meters provide higher accuracy and are used for laboratory measurements, certification, and compliance testing.
Class 2 meters are suitable for general-purpose noise measurements where ultra-high precision is not required.