Prediction of the airborne sound transmission through the front end of a vehicle

Lloret, María Gavilá; Duvigneau, Fabian; Gabbert, Ulrich; Rottengruber, Hermann

doi:10.1007/s41104-019-00051-z

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…The air-borne noise is dominant in the high-frequency range; hence, air-borne noise contributing to the interior noise can be effectively mitigated through the improvement in cab sound insulation and the utilization of acoustic materials 10 from the perspective of transfer path. Introducing changes in the noise transfer path is a key tool when the characteristics of the source cannot be improved 11 . The third type is the noise generated by internal sources.…”

Section: Introductionmentioning

confidence: 99%

Effect of sound insulation on noise reduction in an agricultural tractor cab

Han

Im²,

Choi³

et al. 2022

Sci Rep

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Tractor cab interior noise is a risk factor that degrades operators’ work performance and threatens their health; therefore, the noise must be reduced to ensure farmworkers’ safety and efficiency. Cab interior noise can be classified as structure-borne noise and air-borne noise. Structure-borne noise has been extensively studied. However, although air-borne noise greatly contributes to cab interior noise, detailed frequency-domain analyses have not been performed. In this study, the components of cab interior noise were identified in the frequency domain through an order analysis, which helped improve the sound insulation of the cab and reduce the effects of air-borne noise. A test was performed while driving a tractor on a chassis dynamometer in a semi-anechoic chamber for reproducible measurement and evaluation. The A-weighted sound pressure was transformed by a fast Fourier transform algorithm, and its order was tracked by the engine speed signal. In addition, a direct path was identified by acoustic images using a sound camera. The contributions of major noise sources were identified through an order analysis. We proved that air-borne noise significantly contributes to the interior noise of tractor cabs and that improvement of the cab sound insulation is an effective noise-reduction technique.

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Section: Introductionmentioning

confidence: 99%

Effect of sound insulation on noise reduction in an agricultural tractor cab

Han

Im²,

Choi³

et al. 2022

Sci Rep

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Acoustic Properties of Multilayered Structures

Yuan

Dong-Xiong

2020

Acoust Aust

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Implementation of Laboratory Measurement of Airborne Sound Insulation Based on Iso and Astm Standards in National Standardization Agency of Indonesia (Bsn)

et al. 2021

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<p>The implementation of laboratory measurement of airborne sound insulation based on ISO and ASTM standards was carried out at SNSU BSN. The aim of this work to realize the measurement of airborne sound insulation for several sample tests, where the procedure of the test is performed according to the updated standard ISO 10140 and ASTM E90. Besides, the single number rating also is determined based on ISO 717-1 and ASTM E413. This measurement has been conducted in the two reverberation rooms using pressure method consist of measuring the sound pressure level, measuring the reverberation time, obtaining the sound reduction index (R) or sound transmission loss (STL), and determination of a single-number ratings of the samples test. From the results, some parameter requirements such as the frequency range and the rounding procedure of R or STL influence the measurement result slightly. Subsequently, the significant difference is obtained for the determination of single number rating in the shifting procedure of the reference curve.</p>

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Prediction of the airborne sound transmission through the front end of a vehicle

Cited by 4 publications

References 13 publications

Effect of sound insulation on noise reduction in an agricultural tractor cab

Effect of sound insulation on noise reduction in an agricultural tractor cab

Acoustic Properties of Multilayered Structures

Implementation of Laboratory Measurement of Airborne Sound Insulation Based on Iso and Astm Standards in National Standardization Agency of Indonesia (Bsn)

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