Abstract: In one aspect, this document features an enclosure for housing an acoustic transducer. The enclosure is configured to be disposed in a vehicle between an inner panel and an outer panel of the vehicle, the inner panel being closer to an interior of the vehicle than the outer panel. The enclosure includes a structure enclosing an acoustic volume for the acoustic transducer, the structure having multiple segments that include a first segment configured to be attached to the inner panel, and two or more subsequent segments disposed at increasing distances from the first segment towards the outer panel. Each of the multiple segments is connected to at least one other of the multiple segments by an interface that is configured to allow the corresponding segments to separate upon an impact, thereby allowing one or more of the multiple segments to collapse into corresponding adjacent segments.