Freefieldmikrofoner

Freefieldmikrofoner, also known as free-field microphones, are specialized audio measurement devices designed to capture sound in a manner that accurately represents how humans perceive sound in open environments. These microphones are calibrated to have a flat frequency response within a specified free-field condition, which assumes sound waves arrive at the microphone from a distant source with minimal reflections and diffractions.

The primary application of free-field microphones is in acoustical measurements, such as testing loudspeakers, concert halls, and outdoor audio environments. They are engineered with directional characteristics, typically employing specific polar patterns like omnidirectional or directional capsules, to simulate free-field conditions where sound waves travel directly from the source without significant reflections or obstructions.

Free-field microphones are distinguished from diffuse-field microphones, which are calibrated for reverberant environments. Unlike pressure microphones used for laboratory measurements, free-field microphones include an integrated, calibrated acoustic aperture that compensates for boundary effects, making them suitable for outdoor or large space measurements.

Calibration of free-field microphones is crucial for ensuring accurate data. They are typically calibrated in an anechoic chamber or free-field environment against a known standard, with the calibration data stored and used to correct measurements.

Overall, freefieldmikrofoner are essential tools in acoustics for precise sound measurement in open or outdoor environments, enabling researchers and engineers to analyze and optimize sound performance with high accuracy.