مدلسازی آزردگی صوتی بکهو لودر بر اساس معیارهای کیفیت صدا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

2 استاد، گروه مهندسی مکانیک ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

3 استادیار، گروه مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه اراک، اراک، ایران

چکیده

آلودگی صوتی علاوه بر اثرات سوء بر سلامت جسمی افراد به لحاظ کیفی نیز می‏تواند شرایط آزاردهنده‏ای برای افرادی که در معرض آن قرار دارند ایجاد نماید. بنابراین علاوه بر ارزیابی پارامترهای کمّی صدا، بررسی پارامترهای کیفی صدا در محیط‏های کاری نیز کاملاً ضروری است. در این تحقیق، معیارهای کیفی صدای یک دستگاه بکهو لودر شرکت هپکو مورد ارزیابی قرار گرفت. با استفاده از معیارهای بلندی، تیزی و قدرت نوسان، مدل آزردگی صوتی ماشین مورد آزمون تعیین شد. ضریب تشخیص مدل آزردگی صوتی و آزمون ژوری برابر 93/0 به دست آمد. همچنین مدل آزردگی صوتی حاصل از این تحقیق با دو مدل آزردگی بی‏طرفانه و روان-آکوستیک مقایسه شد. نتایج حاصل از این مقایسه نشان داد که روند تغییرات مدل پیشنهاد شده در نسبت‏‏های دنده مختلف با دو مدل دیگر متفاوت است. بنابراین می‏توان با اندازه‏گیری صدای ماشین و استخراج معیارهای کیفی آن، میزان آزردگی صوتی داخل کابین را محاسبه نمود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Acoustic Annoyance Modelling in Backhoe Loader Based on Sound Qualitative Metrics

نویسندگان [English]

  • ABBAS KHANMOHAMMADI 1
  • Ali Rajabipour 2
  • Majid LASHGARI 3
  • Hossein Mobli 2
1 MSc. Student, Mechanics of Agricultural Machinery Department, Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
2 Professor, Mechanics of Agricultural Machinery Department, Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
3 Assistant Professor, Biosystems Engineering Department, Faculty of Agriculture, Arak University, Arak, Iran
چکیده [English]

In addition to harmful effects on the physical health of people, noise pollution can also create annoyance conditions for those who are exposed to it. Therefore, in addition to evaluating the sound quantity parameters, it is absolutely essential to examine the sound qualitative parameters in the work environment. In this research, the sound qualitative metrics of the HEPCO backhoe loader were evaluated. The acoustic annoyance model of the tested machine was determined using loudness, sharpness and fluctuation strength. The coefficient of determination of acoustic annoyance model and jury test was 0.93. Also, the acoustic annoyance model from this study was compared with two unbiased and psychoacoustic annoyance models. The results of this comparison showed that the proposed model changes in the gear ratios are not identical with the other two models. Therefore, by measuring the sound of the machine and extracting its quality metrics, it can calculate the acoustic annoyance inside the cabin.

کلیدواژه‌ها [English]

  • Keywords: Unbiased Annoyance
  • Psychoacoustic
  • Jury Test
  • Gear Ratio
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