DIRECT FIELD ACOUSTIC TESTING IN A SEMI-REVERBERANT ENCLOSURE

摘要

An acoustic testing system includes at least four control microphones, at least four acoustic transducers, an acoustic enclosure with pre-determined reverberant characteristics which contains the at least four control microphones and the at least four acoustic transducers, a control system configured to produce a predetermined acoustic field as measured by the at least one control microphone. A unit under test is also disposed within the acoustic enclosure. Using an acoustic enclosure with pre-determined reverberant characteristics results of the increased proportion of reflected sounds in the area proximate to the unit under test such that less power is required to achieve a given acoustic test level than in a purely direct field acoustic test.

主权项

1. An acoustic testing system comprising:
at least four control microphones; at least four acoustic transducers or groups of transducers; an acoustic enclosure with pre-determined reverberant characteristics which contains said at least four control microphones and said at least four acoustic transducers or groups of transducers; and a control system configured to produce a predetermined acoustic field as measured by said at least four control microphones, wherein the at least four acoustic transducers or groups of transducers are operatively coupled to the control system such that the output of each transducer is separately controllable by the control system such that a separate output signal is received by each transducer from the control system.