Abstract
The possibility of microphone vibrat ion in introducing error to tyre/road measurement with Close- Proximity Method (CPX) is studied. Results show that the measuring microphone mounted in the acoustic trailer produce erroneous signal when it is set to vibrate. The vibration- induced error is added to the measured tyre/road noise. This paper attempts to correct the measured noise level by filtering the vibrationinduced erroneous signal using "vibration to erroneous signal" correction factors. A laboratory test is conducted to find the relation between microphone vibration and the erroneous signal. The vibration information in on-road CPX measurement is collected. A case study applying the developed correction procedures is demonstrated.
| Original language | English |
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| Title of host publication | 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 |
| Pages | 565-570 |
| Number of pages | 6 |
| Volume | 1 |
| Publication status | Published - 1 Dec 2011 |
| Event | 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan Duration: 4 Sep 2011 → 7 Sep 2011 |
Conference
| Conference | 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 |
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| Country/Territory | Japan |
| City | Osaka |
| Period | 4/09/11 → 7/09/11 |
Keywords
- CPX measurement
- Tyre/road noise
- Vibration
ASJC Scopus subject areas
- Acoustics and Ultrasonics