Sound quality evaluation of noise emitted from brush cutters

Masayuki Takada, Kohei Iida, Shoki Tsunekawa, Shin ichiro Iwamiya

Research output: Contribution to conferencePaper

Abstract

Engine-driven brush cutters generally generate noise with a high sound pressure level. Although such noise should be attenuated as a first countermeasure, improved design of the sound quality is another valid approach. The perceived quality of noise emitted by brush cutters operated at various engine speeds was measured using a semantic differential method. Stimuli induced, for example, muddy, rough, noisy and unpleasant impressions. There was a difference in the impression of undulation between two-stroke-engine sounds and four-stroke-engine sounds. Furthermore, correlation analysis between rating results and metrics indicated that the perceived quality was affected by loudness. We therefore then employed stimuli having the same loudness. Results of semantic differential experiments revealed that two-stroke-engine sounds were rated as being significantly more undulating and unpleasant than four-stroke-engine sounds at various engine speeds. Furthermore, the impression of unpleasantness was significantly correlated with that of undulation for a wide range of engine speeds. It was supposed that the impression of undulation is related to the fluctuating temporal envelope created by unstable salient peaks in the waveform of stimuli, which are likely caused by the incomplete internal combustion of fuel.

Original languageEnglish
Publication statusPublished - Jan 1 2018
Event47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018 - Chicago, United States
Duration: Aug 26 2018Aug 29 2018

Other

Other47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018
CountryUnited States
CityChicago
Period8/26/188/29/18

Fingerprint

cutters
brushes
engines
acoustics
evaluation
strokes
stimuli
loudness
semantics
countermeasures
ratings
sound pressure
waveforms
envelopes

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Takada, M., Iida, K., Tsunekawa, S., & Iwamiya, S. I. (2018). Sound quality evaluation of noise emitted from brush cutters. Paper presented at 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018, Chicago, United States.

Sound quality evaluation of noise emitted from brush cutters. / Takada, Masayuki; Iida, Kohei; Tsunekawa, Shoki; Iwamiya, Shin ichiro.

2018. Paper presented at 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018, Chicago, United States.

Research output: Contribution to conferencePaper

Takada, M, Iida, K, Tsunekawa, S & Iwamiya, SI 2018, 'Sound quality evaluation of noise emitted from brush cutters' Paper presented at 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018, Chicago, United States, 8/26/18 - 8/29/18, .
Takada M, Iida K, Tsunekawa S, Iwamiya SI. Sound quality evaluation of noise emitted from brush cutters. 2018. Paper presented at 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018, Chicago, United States.
Takada, Masayuki ; Iida, Kohei ; Tsunekawa, Shoki ; Iwamiya, Shin ichiro. / Sound quality evaluation of noise emitted from brush cutters. Paper presented at 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018, Chicago, United States.
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