Sound test device for, and a method of, testing a DUT, in particular a MEMS microphone

A sound test device for testing a DUT, wherein the sound test device comprises:

• a sound chamber comprising at least one speaker cave each comprising a hollow space extending radially outwards;
• a socket unit;
• and
• a sound generator unit, wherein the sound generator unit includes:
• a speaker comprising a speaker membrane,
• an opening adapted to receive a DUT opening of the DUT, and
• a reference microphone comprising a microphone membrane, wherein the microphone membrane and the opening are arranged to oppose each other;
• and
• wherein the socket unit includes at least one contact element adapted to contact to a contact terminal of the DUT, and
• wherein the sound chamber is limited by the at least one speaker cave, the speaker membrane, the microphone membrane, and the opening.