Question

Noise is from both external and internal sources,what are they and how it can br over come. Discuss in detail.

Answer 1

I don't no the answer of your question

Answer 2

Identify the sound sources: vibrating sources and aerodynamic flow.Identify the path of the noise from the source to the worker.Determine the sound level of each source.Determine the relative contribution to the excessive noise of each source and rank the source accordingly. To obtain significant noise attenuation, the dominant source should be controlled first.Know the acceptable exposure limits identified in the health and safety legislation and quantify the necessary sound reduction.Identify solutions by taking into consideration the degree of sound attenuation, operation, and productivity restraints and