Noise from road racing motorcycles: Emission measurement and immission prediction

Tapio Lahti

Research output: Book/ReportReport

Abstract

Various sound levels characterising the noise emission of Road Racing motorcycles were deternined during the Finnish GP at Imatra in July 1985. The noise was recorded simultaneously in three positions near the racing circuit during all the practice and competition rounds of the classes 125, 250 and 500 cm3. Emission was characterised by the maximum sound level LAmax at 10 m distance, as required by a Swedish prediction model for motor sports noise. Also the equivalent levels LAeg at the same distance were determined. The results were 111 to 113 dB for the LAmax and 97 to 101 dB for the LAeg. The noise immission levels measured at larger distances were compared to those predicted by two alternate models. No direct conclusions could be drawn on the basis of the comparisons, due to the limited number of the immission positions. Finally, the sound level quantity and the data base of the Swedish model were criticized indirect on fundamental grounds. It was concluded that this model is not preferable because of the unsuccessful choice of the noise descriptor LAmax and the obviously unreliable emission data. It was recommended to be replaced by a version using the LAeg as the basic noise descriptor instead.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages50
ISBN (Print)951-38-2833-6
Publication statusPublished - 1987
MoE publication typeNot Eligible

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tiedotteita
Number704
ISSN0358-5085

Fingerprint

roads
predictions
level (quantity)
acoustics
data bases

Keywords

  • noise (sound)
  • noise control
  • emissions
  • motorcycles
  • roads
  • models
  • measurements

Cite this

Lahti, T. (1987). Noise from road racing motorcycles: Emission measurement and immission prediction. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tiedotteita, No. 704
Lahti, Tapio. / Noise from road racing motorcycles : Emission measurement and immission prediction. Espoo : VTT Technical Research Centre of Finland, 1987. 50 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 704).
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abstract = "Various sound levels characterising the noise emission of Road Racing motorcycles were deternined during the Finnish GP at Imatra in July 1985. The noise was recorded simultaneously in three positions near the racing circuit during all the practice and competition rounds of the classes 125, 250 and 500 cm3. Emission was characterised by the maximum sound level LAmax at 10 m distance, as required by a Swedish prediction model for motor sports noise. Also the equivalent levels LAeg at the same distance were determined. The results were 111 to 113 dB for the LAmax and 97 to 101 dB for the LAeg. The noise immission levels measured at larger distances were compared to those predicted by two alternate models. No direct conclusions could be drawn on the basis of the comparisons, due to the limited number of the immission positions. Finally, the sound level quantity and the data base of the Swedish model were criticized indirect on fundamental grounds. It was concluded that this model is not preferable because of the unsuccessful choice of the noise descriptor LAmax and the obviously unreliable emission data. It was recommended to be replaced by a version using the LAeg as the basic noise descriptor instead.",
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Lahti, T 1987, Noise from road racing motorcycles: Emission measurement and immission prediction. Valtion teknillinen tutkimuskeskus. Tiedotteita, no. 704, VTT Technical Research Centre of Finland, Espoo.

Noise from road racing motorcycles : Emission measurement and immission prediction. / Lahti, Tapio.

Espoo : VTT Technical Research Centre of Finland, 1987. 50 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 704).

Research output: Book/ReportReport

TY - BOOK

T1 - Noise from road racing motorcycles

T2 - Emission measurement and immission prediction

AU - Lahti, Tapio

PY - 1987

Y1 - 1987

N2 - Various sound levels characterising the noise emission of Road Racing motorcycles were deternined during the Finnish GP at Imatra in July 1985. The noise was recorded simultaneously in three positions near the racing circuit during all the practice and competition rounds of the classes 125, 250 and 500 cm3. Emission was characterised by the maximum sound level LAmax at 10 m distance, as required by a Swedish prediction model for motor sports noise. Also the equivalent levels LAeg at the same distance were determined. The results were 111 to 113 dB for the LAmax and 97 to 101 dB for the LAeg. The noise immission levels measured at larger distances were compared to those predicted by two alternate models. No direct conclusions could be drawn on the basis of the comparisons, due to the limited number of the immission positions. Finally, the sound level quantity and the data base of the Swedish model were criticized indirect on fundamental grounds. It was concluded that this model is not preferable because of the unsuccessful choice of the noise descriptor LAmax and the obviously unreliable emission data. It was recommended to be replaced by a version using the LAeg as the basic noise descriptor instead.

AB - Various sound levels characterising the noise emission of Road Racing motorcycles were deternined during the Finnish GP at Imatra in July 1985. The noise was recorded simultaneously in three positions near the racing circuit during all the practice and competition rounds of the classes 125, 250 and 500 cm3. Emission was characterised by the maximum sound level LAmax at 10 m distance, as required by a Swedish prediction model for motor sports noise. Also the equivalent levels LAeg at the same distance were determined. The results were 111 to 113 dB for the LAmax and 97 to 101 dB for the LAeg. The noise immission levels measured at larger distances were compared to those predicted by two alternate models. No direct conclusions could be drawn on the basis of the comparisons, due to the limited number of the immission positions. Finally, the sound level quantity and the data base of the Swedish model were criticized indirect on fundamental grounds. It was concluded that this model is not preferable because of the unsuccessful choice of the noise descriptor LAmax and the obviously unreliable emission data. It was recommended to be replaced by a version using the LAeg as the basic noise descriptor instead.

KW - noise (sound)

KW - noise control

KW - emissions

KW - motorcycles

KW - roads

KW - models

KW - measurements

M3 - Report

SN - 951-38-2833-6

T3 - Valtion teknillinen tutkimuskeskus. Tiedotteita

BT - Noise from road racing motorcycles

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Lahti T. Noise from road racing motorcycles: Emission measurement and immission prediction. Espoo: VTT Technical Research Centre of Finland, 1987. 50 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 704).