Patent ID: 8336670
Filing Date: 2012-12-25
Classification: H04R

Abstract:
1. Microelectromechanical system testing device, comprising: an acoustic chamber having two opposing walls; a sound source for generating sound within the acoustic chamber at a first frequency in the range of 20 Hz to 10 kHz, the sound source being arranged at one of the opposing walls; and an interface for coupling one or more microelectromechanical systems thereto, the interface being arranged at the other of the two opposing walls and comprising a respective coupling site for each microelectromechanical system; wherein the acoustic chamber is adapted to have a total harmonic distortion (THD) at each coupling site of the interface for the first frequency below 1%, when including all harmonics of the first frequency in the range of 20 Hz to 20 kHz; wherein a plurality of microelectromechanical systems is coupleable to the coupling sites of the interface, wherein the microelectromechanical system testing device is adapted to have a difference in sound pressure at any one of the interface coupling sites and at a reference point at the interface, in particular the center of the interface, of less than 0.2 dB, and wherein the microelectromechanical system testing device is adapted to have a difference between the total harmonic distortion at any one of the interface coupling sites and at the reference point below 5% of the total harmonic distortion at the reference point.