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Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
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Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
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A framework for the acoustic simulation of passing vehicles using variable length delay lines.

Stefano Damiano1, Luca Bondi2, Andre Guntoro3

  • 1Department of Electrical Engineering (ESAT), STADIUS Center for Dynamical Systems, Signal Processing and Data Analytics, KU Leuven, Kasteelpark Arenberg 10, Leuven, 3001 Belgium.

EURASIP Journal on Audio, Speech, and Music Processing
|October 7, 2024
PubMed
Summary
This summary is machine-generated.

TrafficSoundSim is an open-source acoustic simulator for vehicle noise. It accurately models passing vehicles using source generation and propagation models, enabling perceptual assessment of urban soundscapes without recorded data.

Keywords:
Acoustic simulationDoppler effectRoad acoustic propagationTraffic noise synthesisVariable length delay lines

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Area of Science:

  • Acoustics and Signal Processing
  • Urban Planning and Environmental Science

Background:

  • Traffic noise is a major urban pollutant impacting human activities.
  • Accurate simulation of individual vehicle sounds is crucial for noise assessment and abatement strategies.

Purpose of the Study:

  • To present TrafficSoundSim, an open-source framework for simulating the acoustic characteristics of passing vehicles.
  • To enable perceptual assessment of traffic noise and the contribution of individual vehicles to the urban soundscape.

Main Methods:

  • Vehicle sound generation combining road/tire and engine noise.
  • Acoustic propagation modeling using variable length delay lines, incorporating air absorption, ground reflection, and source directivity.
  • Decoupled source signal generation and propagation stages implemented with finite impulse response filters.

Main Results:

  • The TrafficSoundSim framework accurately simulates vehicle pass-by events.
  • Generated sounds show a good match with recorded events in terms of power spectral density and psychoacoustic metrics.
  • The simulation results are perceptually plausible, validating the framework's effectiveness.

Conclusions:

  • TrafficSoundSim provides a flexible, data-independent tool for acoustic simulation of road traffic.
  • The framework supports research into traffic noise modeling, assessment, and the development of abatement strategies.
  • This open-source simulator can enhance the understanding and management of urban soundscapes.