ТОР 5 статей: Методические подходы к анализу финансового состояния предприятия Проблема периодизации русской литературы ХХ века. Краткая характеристика второй половины ХХ века Характеристика шлифовальных кругов и ее маркировка Служебные части речи. Предлог. Союз. Частицы КАТЕГОРИИ:
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Key questions and tasks1. What is noise? What is the difference between sound and noise? 2. How are sound power level and sound pressure level related? 3. Give definition of unit of sound level. 4. For what octave frequency band and why the A - weighted factors is equal to zero? 5. When are the following A-, B-, C-, and D - scales for noise measurement used? 6. Frequency is the number of waves produced every___ 7. Frequency is measured in units called____ 8. The ___________ is the time taken for one wave to pass a point. 9. In one second 200 sound waves pass a point. Calculate their frequency f=_______ Hz 10. In 8 seconds 24 water waves pass a point. Calculate their frequency f=_______ Hz 11. Sound waves have a frequency of 5 kHz. Calculate their period T = ______ sec. 12. List possible effects of the noise influence on human body 13. Specify the major physical quantities for sound and noise assessment 14. What type of transport is the most annoying? 15. Name the main legislative acts for noise control in Ukraine. 16. What types of noise control do you know?
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