Development of a testing method for the perceptibility of acoustic warning signals with hearing protection in public road

Project No. FF-FP 0443




Professional activities in the public road traffic, for example, vegetation maintenance, street and sewer cleaning or waste collection, may require hearing protection. As the perceptibility of warning signals (for example, hooters, police sirens, reverse alarms) must not be diminished by the ear protection, a method shall be developed for an individual audio test for those who work in the fields mentioned above to ensure, that the selected hearing protection device is not only generally but also individually appropriate.


  • Selection of relevant background sounds and warning signals
  • Recording and level metering of the signals
  • Development of a test method with binaural presentation of the test stimuli by both, ear phones and loudspeakers
  • Set up of a computer program for the measurement of the listening threshold of the test signals
  • Test and final adjustment of the test method

Last Update:



Financed by:
  • Deutsche Gesetzliche Unfallversicherung e. V. (DGUV)
Research institution(s):
  • Müller-BBM GmbH

-cross sectoral-

Type of hazard:



personal protective equipment, noise

Description, key words:

testing method, warning signals, hearing protection, public road traffic