For the solution of noise problems, it is very convenient to view the system in terms of a source, a path and a receiver, as shown in Fig. 3 in the form of a block diagram. The source is the point (or points) in space where the noise apparently originates. The path is the line […]
Short Notes on Noise Control | Noise Pollution
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Vibrations: Sources, Effects and Safety Measures
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After reading this article you will learn about Vibrations:- 1. Introduction to Vibrations 2. Sources of Vibrations 3. Measurement 4. Effects on Human Body 5. Diseases 6. Safety Measures. Contents: Introduction to Vibrations Sources of Vibrations Vibration Measurement Effects of Vibrations on Human Body Vibration Diseases Safety Measures against Vibration 1. Introduction to Vibrations: Machinery, […]
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Ultrasound: Meaning, Frequency and Effects
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After reading this article you will learn about Ultrasound:- 1. Meaning of Ultrasound 2. Low-Frequency Ultrasound 3. Biological Effects 4. Permissible Levels. Meaning of Ultrasound: Ultrasound is a mechanical vibration of an elastic medium in which it is propagated in the form of alternating compressions and expansions. Ultrasonic vibrations cover frequency ranges beyond about 16-20 […]