Hearing rod

A hearing rod (also known as listening rod ) is a tool for diagnosing faults in engines.

A hearing stick consists of a 50 to 80 cm long wooden stick with a 2 to 3 cm diameter and a 5 to 10 cm long attached metal tube. The connection between the cranial bones and the external contact with a closed system as well as the amplification of the sound through resonance of the hearing rod means that noises from the interior of the closed system can be heard.

In the 1930s, a hearing rod was sold in Germany under the brands "Diaton Resonator" and "Meccano Stethoscop".

Individual evidence

↑ Stefan Krebs: Automobile noises as information: About the trained ear of the automobile mechanic . In: Andi Schoon (Ed.): The trained ear. A cultural history of sonification . transcript-Verlag, Bielefeld 2012, p. 95-110 .

[1] Stefan Krebs: Automobile noises as information: About the trained ear of the automobile mechanic . In: Andi Schoon (Ed.): The trained ear. A cultural history of sonification . transcript-Verlag, Bielefeld 2012, p. 95-110 .