Field investigations of traffic flow on the basis of the intensity of the directional microphone
Abstract
Field investigations of traffic flow on the basis of the intensity of the directional microphone
Incoming article date: 22.11.2016We describe the design of a directional microphone and a methodology for conducting the tests. In a controlled motion lane highway conducted field observations made by the authors microphone. As a result of the simulation is determined relative measurement error. It is shown that in order to reduce relative error detector transport recommended in 30-100 m behind the traffic lights, since the start of the vehicle the sound coming from the car, increases. Within the measurement error of 12%, a passive acoustic detection of transport, can be applied in the total intensity on the stretch of road that does not exceed 400 vehicles / h.
Keywords: transport stream, transport noise, passive acoustic detector, directional microphone