Multiple barrier test fixture and method of testing using the same

A method of testing at least one acoustic device, the method comprising:

• opening a test fixture, the test fixture including a first barrier structure, a second barrier structure, a gap between the first barrier structure and the second barrier structure, at least one isolator disposed in the gap, the isolator being configured to couple the first barrier structure to the second barrier structure, and a test bed disposed within the second barrier structure and configured to have acoustic devices coupled thereto;
• coupling at least one device to be tested to the test bed;
• testing the at least one device, such that the first barrier structure, the second barrier structure, the gap, and the at least one isolator act and are effective to dampen vibrations of the fixture and provide an acoustic isolation for the at least one acoustic device at the test bed from acoustic or vibrational energy originating from outside the fixture.