Any auto mechanic can tell you what a nightmare it can be diagnosing random squeaks, clunks and bangs. And the task becomes even more difficult when, inevitably, the sound can’t be reproduced in the shop. Steelman’s Wireless Chassis Ear offers a way to acoustically isolate the offending noise while under real-world road stress.
The ‘Ear’s receiver can handle up to six transmitters, though only four come in the kit. Attach the wireless inductive microphones via the battery clip-like clamps to the suspected chassis and suspension components. The ‘Ear relays audio through its internal speaker or a headphone jack. An L.E.D. bar graph on the receiver indicates sound strength, and a tech can switch between channels to locate the problem during a road test. The kit goes for about $250.00, and the receiver uses 4 AA batteries and each microphone unit needs 4 AAA cells, so you might want to hit your local wholesale club store first.