Sound Quality Evaluation Method for Engine Combustion Noise in an Engine Acoustic Test Cell

Torii, Kenji; Noumura, Kousuke; Miyazawa, Masaya; Kondo, Takashi

doi:10.4271/2021-01-0674

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…The formula for calculating the vibration isolation rate of the powertrain suspension system is [19]:…”

Section: Comparative Analysis Of Vibration Isolation Ratementioning

confidence: 99%

Cause Analysis of Whole Vehicle NVH Performance Degradation under Idle Conditions

Lai,

Xu,

Liu

et al. 2024

MITS

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The NVH (noise, vibration, harshness) performance of automobiles is a key issue in enhancing user comfort. However, car manufacturers and original equipment manufacturers often invest more research and development effort into the new car performance at the initial design stage, neglecting the study of whole vehicle NVH durability and reliability, and this can significantly affect the user's riding experience. This paper focuses on the phenomenon of NVH performance degradation under idle conditions. Using LMS data acquisition equipment and software, vibration acceleration and frequency at 17 points on the vehicle, including the steering wheel, seat rail, and engine mount, were collected and analyzed. By conducting comparative experiments, the causes of NVH performance degradation after long mileage were explored. This aims to provide new ideas for improving the durability and reliability of whole vehicle NVH in future research and production.

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“…The formula for calculating the vibration isolation rate of the powertrain suspension system is [19]:…”

Section: Comparative Analysis Of Vibration Isolation Ratementioning

confidence: 99%

Cause Analysis of Whole Vehicle NVH Performance Degradation under Idle Conditions

Lai,

Xu,

Liu

et al. 2024

MITS

View full text Add to dashboard Cite

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Evaluation of Exhilarating Engine Sound by Randomized Controlled Trial

Kondo

2024

SAE Int. J. Veh. Dyn., Stab., and NVH

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<div>To realize the dynamics concept “enjoy driving” of new-model cars, engine sound was based on the concept of “exhilarating.” To achieve “exhilarating,” we compared current models with competitor cars to understand the countermeasure sound characteristics. As a result, it was found that the rumble noise at low-RPM medium load needs to be reduced. To reduce rumble noise, the crankshaft system and power train stiffness were refined. As a result, we were able to achieve our goal of exhilarating engine sound. However, as the evaluation of sound after a vehicle is sold is generally left to the user, there are few studies that examine whether a car is more highly evaluated based on the sounds it creates. Therefore, this study was conducted to evaluate concept compatibility and loyalty in relation to exhilarating engine sound in the U.S. market for Generation Z, the target group for the new car. The reason we surveyed loyalty was because it was a fair evaluation indicator when examining the value of a car from the user’s perspective. Three loyalty items, purchase intention, recommendation intention, and willingness to pay, which are commonly used in marketing to investigate product attractiveness, were used in the survey. For the evaluation, randomized controlled trials, which are considered to have a high level of evidence and are used in medical and pharmacological trials, were applied. As a result, it was found that the engine sound created this time conforms to the concept of “exhilarating,” is attractive to users, and increases car loyalty.</div>

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Sound Quality Evaluation Method for Engine Combustion Noise in an Engine Acoustic Test Cell

Cited by 2 publications

References 10 publications

Cause Analysis of Whole Vehicle NVH Performance Degradation under Idle Conditions

Cause Analysis of Whole Vehicle NVH Performance Degradation under Idle Conditions

Evaluation of Exhilarating Engine Sound by Randomized Controlled Trial

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