Improvement of an objective rating for turbocharger tonal noises
Improvement of an objective rating for turbocharger tonal noises
- New search for: Gaude, Gladys
- New search for: Lamotte, Lucille
- New search for: Lefevre, Thierry
- New search for: Gaude, Gladys
- New search for: Lamotte, Lucille
- New search for: Lefevre, Thierry
Subjective evaluations to quantify noise in a vehicle can be questionable and sometimes not reliable. A method based on microphone measurements has been developed to quantify the annoyance of turbocharger tonal noises in a vehicle. Psycho-acoustic parameters are used to quantify the annoyance; the most important of them is the prominence of the tone itself from the background noise, called Tone To Noise Ratio. The high acceleration rate of turbocharger requires an extraction of the exact frequency of the tone and a robust signal processing technique. This paper presents some solution to these issues. First, the exact frequency of the tone is extracted from vibration measurements of the turbocharger. Then, three different tracking techniques have been studied: Fast Fourier Transform, Pseudo Smoothed Wigner- Ville Distribution and Vold-Kalman filter. Finally, the number and the spatial position of microphones in the vehicle have been optimized. With these solutions, the rating has been updated and validated using a database of 300 tested vehicles. A Software dedicated to turbocharger noises has been developed and provides an Objective Quotation for all turbocharger tonal noises in 2 key driving conditions.
Document information
Improvement of an objective rating for turbocharger tonal noises
Verbesserung einer objektiven Einstufung von Turboladertönen
2006
9 Seiten, 4 Bilder, 1 Tabelle, 3 Quellen
Conference paper
Storage medium
English
Fahrzeugbau , Akustik , Turbolader , Schallabstrahlung , Ton (Akustik) , akustische Messung , Frequenz , Signalverarbeitung , FFT (schnelle Fourier-Transformation) , mathematisches Filter , Schallpegel , Schwingungsmessung , Mechanik , Sonogramm , Mikrophon , experimentelle Untersuchung , Versuchsaufbau , Störgeräusch , Drehzahl
Similar titles
Numerical investigation of marine diesel engine turbocharger compressor tonal noise
| SAGE Publications | 2020
Tonal Noises and High-Frequency Oscillations of Rails Caused by Grinding Procedures
| Springer Verlag | 2021
Tonal Noises and High-Frequency Oscillations of Rails Caused by Grinding Procedures
| British Library Conference Proceedings | 2021
| DOAJ | 2014