Patent ID: 9084060
Filing Date: 2015-07-14
Classification: H04R

Abstract:
1. A test device for conducting a test on a noise reduction headphone, characterized in that the test device comprises an enclosed cavity, a noise source, a test panel, a measuring microphone and a measure comparison module connected with the measuring microphone, wherein, the sound emitted from the noise source is sealed within the enclosed cavity; the test panel can cooperate with the noise reduction headphone to form a coupling cavity during the test; the test panel has a sound guiding hole in the common part with the enclosed cavity for transmitting the sound of the noise source into the interior of the coupling cavity; the test panel also has a mounting hole, the measuring microphone is mounted on the mounting hole towards the direction of the coupling cavity; the measuring microphone records noise signals before and after the noise reduction function of the noise reduction headphone is activated; the measure comparison module receives the signals recorded these two times by the measuring microphone and performs comparison processing to obtain the noise reduction amount of the noise reduction headphone.