DEVICE AND METHOD FOR ACOUSTIC MEASUREMENTS OF PLURALITY OF LOUDSPEAKERS AND SYSTEM OF DIRECTIONAL MICROPHONES Russian patent published in 2017 - IPC H04R5/04 

FIELD: measuring equipment.

SUBSTANCE: invention relates to acoustic metrology. Device for acoustic measurements comprises a test signal generator, microphones, a controller configured to control loudspeakers and providing signal processing so that combination of sound signals received by a microphone are associated with each of plurality of loudspeakers. Device also comprises an evaluator which determines state of loudspeakers. System of directional microphones comprises three pairs of microphones, oriented in one direction, a mechanical support consisting of three mutually orthogonal spatial axes, and a seventh microphone located at point of mutual intersection of three spatial axes. Support also has a laser device for positioning system of directional microphones. Processor is configured to calculate distance between system of directional microphones and loudspeaker, calculate pulse characteristic or transfer function of loudspeaker. Evaluator enables to calculate direction of arrival of sound using an omnidirectional signal and signals of oscillatory speed of air particles and enables to evaluate spatial power density.

EFFECT: higher efficiency and accuracy of acoustic measurements.

14 cl, 15 dwg