Loudspeaker testing in production is the most difficult one of audio quality measurements, and also the most relevant, since loudspeakers have higher distortion than other audio components.
Loudspeaker testing verifies the correct assembly and functionality of the device loudspeaker.
In an acoustically attenuated environment, an artificial ear is placed against the device loudspeaker opening. The artificial ear forms a separate chamber with a foam ring around the microphone to reduce external interference. The artificial ear microphone measures the acoustic audio signal and provides an electrical signal for the instrument to process. Testing can be done by using a single or multiple frequencies.