• 제목/요약/키워드: Sound quality metric

검색결과 22건 처리시간 0.026초

감성 품질 향상을 위한 자동차 Horn의 선호 음질에 관한 연구 및 음질 요소 개발 (Study Concerning Preference for Noise Quality of Automotive Horn for Improvement of Perceived Quality and Improvement of New Noise Metric)

  • 강희수;이상권;신태진;정기웅;박동철
    • 한국소음진동공학회논문집
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    • 제25권3호
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    • pp.141-149
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    • 2015
  • In this study, there is an investigation about the sound quality of automotive horn that attached to luxury sedans. In order to define a questionnaire of horn sound quality the factor analysis is conducted. Ten automotive horns are selected for this research and ten passenger cars(nine is luxury sedan and one economy class car). Luxury is used for the questionnaire as an attribute for the sound quality of car horn. The interior noises for ten test cars are recorded and used for the subjective analysis of car horn sound. In the paper, new sound metric for the car horn sound is presented. The new sound metric is used for the objective sound index for the prediction of subjective sound quality of car horn.

생리음향을 이용한 도어 닫힘음의 정량적 평가를 위한 새로운 음질요소의 개발 (Sound Metric Design for Quantification of Door Closing Sound Utilizing Physiological Acoustics)

  • 신태진;이승민;이상권
    • 한국소음진동공학회논문집
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    • 제23권1호
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    • pp.73-83
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    • 2013
  • In previous works, psychoacoustic parameters have been used for objective quantification. However, these parameters do not agree well with subjective assessment. Therefore, the correlation between psychoacoustic parameters and the subjective rating of door closing sounds of sampled cars is low, and it is not sufficient to use psychoacoustic parameters as an objective metric to quantify the sound quality of door closing sounds. In this paper, a new method is proposed to objectively quantify the sound quality based on physiological acoustics and statistical signal processing. The gammatone filter, as a pre-processing, is used in models of the auditory system and kurtosis, which is the fourth-order moment of temporal signal, and is used to extract information about sound quality quantification for door closing sounds. The new metric obtained through the proposed method is highly correlated with subjective rating, and it is successfully applied to the quantification of the sound quality of door closing sounds.

승합차량의 액슬기어 음질의 평가를 위한 새로운 순음도 모델 개발과 응용 (Tonality Design for Sound Quality Evaluation for Gear Whine Sound)

  • 김의열;장지욱;이상권
    • 한국소음진동공학회논문집
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    • 제22권12호
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    • pp.1172-1183
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    • 2012
  • Aure's tonality was considered as the sound metrics for the expression of the tonality of gear whine sound in a previous research. It was failed to use the Aure's tonality as a sound metric for the tonal impression. Thus Aures's tonality, was developed for tonal impression in previous research. However, this metric did not express well the tonality of gear whine sound since the whine sound is a non-stationary signal with frequency modulation and amplitude modulation. In this study, the new method for the tonality evaluation for a non-stationary signal is presented. It is developed based on the prominence ratio, tonality impression function, and lower threshold level. It improves the accuracy and reliability of the sound quality index being used for the sound quality evaluation of the axle-gear whine sound.

자동차 임팩트 소음에 대한 음질 요소 개발 (Sound Metric for the Impact Sound of a Car)

  • 박상원;김호욱;나은우;이상권
    • 한국소음진동공학회논문집
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    • 제20권1호
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    • pp.66-73
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    • 2010
  • Vehicles experience the impact due to harsh road conditions. Contact with a barrier on a road induces vehicles to vibrate, which brings about an impact sound. The attenuation of the impact sound is an important issue since passengers may complain about the impact noise. However, the perfect removal of impact noise is not possible as most of impact noise is caused by external conditions. It is thus necessary to make vehicles to possess more desirable sound quality characteristic of impact sound. More research is needed on objective attributes of impact sound; it is not a simple matter since impact noise is transient in nature and has a high level of sound at an instantaneous moment. A new objective attribute of impact noise is designed by using wavelet transform. Wavelet transform is appropriate for the analysis of transient signals such as impact noise. The usefulness of new objective attribute, which is a sound metric, is examined by comparison with the mean subjective rating for real impact noise of passenger cars. The new sound metric has better correlation with the mean subjective rating than already existing sound metrics

차량용 전동 롤러 블라인드의 음질지수 개발 (Sound Quality Index Development of Electrically Powered Vehicle Roller Blind)

  • 성원찬;조현호;김성현;박동철;강연준
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2014년도 추계학술대회 논문집
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    • pp.785-790
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    • 2014
  • The purpose of this study is to identify the significant sound quality metric and compose the sound quality index of motor driven roller blind which is part of vehicle sunroof. Before subjective evaluation, sound characteristics of roller blind was analyzed and set the target operating sound for subjective evaluation. Thus, transfer sound of roller blind which has the characteristics of sound modulation was used for subjective evaluation. Linear regression was carried out by chosen Zwicker's metrics which are pointed by comments of jurors. Loudness and sharpness related metrics are prime metrics in sound quality index we composed. Effect of roller blind assay when it is attached to real vehicle was identified to evaluate the validity of index.

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자동차 임팩트 소음에 대한 주관적 평가 및 차량 개발에 응용 (Estimation of Subjective Evaluations for Impact Sound and Analysis of the Effects for Parts of a Car)

  • 박상원;이상권;배병국
    • 한국자동차공학회논문집
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    • 제18권5호
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    • pp.37-44
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    • 2010
  • Impact noise is induced in a car when it is driven on a harsh road or over some bumps. This noise occurs with the very high level of sound, which affects passengers in some way or other. Although it is impossible to clearly remove such noise, it is necessary to research an improvement in sound quality for impact noise. A new sound metric for impact sound is presented. This metric is verified by comparison between mean subjective ratings and several sound metrics. In this paper, more objective attributes are considered, which the attributes are expressing the level and modulation of sound. Three sound metrics are employed to get impact sound indexes for each course by the method of multiple linear regressions. The indexes are verified by considering the correlation between the estimated values from the multiple linear regressions and the mean subjective ratings by evaluators. Also, the subjective ratings on the indexes are estimated for the case in which some parts of suspension system are changed. The estimated ratings represent more reasonable or acceptable ratings. Thus, such indexes can be used for modification of the parts of suspension system under considering a good sound quality.

차량 D 단 소음의 음질 인덱스 및 등급화 구축 (Construction of the Sound Quality Index and Grade at Automotive Level D Noise)

  • 윤태건;박상길;심현진;이정윤;오재응
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 추계 학술대회논문집(수송기계편)
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    • pp.186-189
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    • 2005
  • Since human listening is very sensitive to sound, a subjective index of a sound quality is required. Therefore, in the analysis for each situation, the sound evaluation is composed with sound quality factor. Many researchers spends their effort to make a more reliable and more accurate of sound in term of sound quality index for various system noise. In this study a reliable index is constructed and analyzed using correlation analysis, regression analysis and weighting factor for each sound quality factor. We have made the sound quality index that agrees with more than human subjective sensitivity which apply to various sound quality metrics. Also we applied a 'grade' metric to jury for sound evaluation, analyzed relation between sound duality index and sound quality grade. Then we will judge the sound quality level according to the sound quality grade scheme.

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인공지능망을 이용한 진공청소기 음질 인덱스 개발 (Development of Index for Sound Quality Evaluation of Vacuum Cleaner)

  • 구진회;전완호;김창준;이상준
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 춘계학술대회논문집
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    • pp.1003-1008
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    • 2004
  • In our life, we have used many digital appliances. They helped us to improve the quality of lift but sometimes gave us unsatisfactory result because they produce specific noise. Especially a vacuum cleaner produces a great deal of noise that is very annoying. So we need to study what sound metrics affect human sensibility. In this paper, we will study sound quality index for vacuum cleaner. The subjective evaluation of vacuum cleaner sound can be indicated to objective parameters by sound metrics of psychoacoustics. The artificial neural network can estimate the nonlinear characteristics of relation between subjective evaluation and sound metrics. We applied the artificial neural network to the development of sound quality index for vacuum sound.

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승용차 부우밍 인덱스 개발에 관한 연구 (BOOMING INDEX DEVELOPMENT IN A PASSENGER CAR)

  • Chae, Hee-Chang;Lee, Sang-Kwon;Park, Dong-Chul;Jung, Seung-Gyoon
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 추계학술대회논문초록집
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    • pp.332.2-332
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    • 2002
  • Booming sound is one of the most important interior sound of a passenger car. The conventional booming noise research was focused on the reduction of the A-weighted sound pressure level. However A-weighted sound pressure level can not give the whole story about the booming sound of a passenger car. In this paper, we employed sound metric which is the subjective parameter used in psychoacoustics. (omitted)

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