Test Device and Test Method for Active Noise Reduction Headphone

摘要

The present invention discloses a test device and a test method for noise reduction headphones. Test apparatus; Consists of a closed cavity, and the noise source, the test panel, measuring comparison module connected with the measurement microphone and measurement microphone. Sound emitted from the noise source is sealed in the sealed cavity. Test panels can cooperate with the noise reduction headphone so as to form a coupling cavity in the test. Test panel has a sound hole in a part of the common guide with a closed cavity for transmitting the sound from the noise source to the interior of the coupling cavity. Test panel also has a mounting hole, measuring microphone is installed in the mounting hole in the direction of the coupling cavity. The microphone measures the noise signal measured before and after the noise reduction headphone of the active noise reduction. Measurement comparison module receives these two signals recorded by the measuring microphone and performing comparison process, in order to obtain the amount of noise reduction of the noise reduction headphone. Technical solutions are treated for noise reduction test is high output (high-power) at the same time to solve the special shielding noise pollution caused by the external noise sources on the environment of the room do not require headphones, requirements for the test environment of the present invention Figure is relaxed. ;