What are the objectives of NVH (Noise Vibration and Harshness) analysis?

What are the objectives of NVH (Noise Vibration and
Harshness) analysis?

Question Posted / n k singh

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What are the objectives of NVH (Noise Vibration and Harshness) analysis?..

Answer / avi

NVH,is the study and modification of the noise and
vibration characteristics of vehicles, particularly cars
and trucks. While noise and vibration can be readily
measured, Harshness is a subjective quality, and is
measured either via "jury" evaluations, or with analytical
tools that provide results reflecting human subjective
impressions. These latter tools belong to the field known
as "psychoacoustics."

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What are the objectives of NVH (Noise Vibration and Harshness) analysis?..

Answer / deepak

Noise vibration and harshness is related to machinery, sound waves for horn, music system and of course for automobile
If the 0 db then good( No NVH) silence zone
if 10-20 low
if 20-30 moderate
if 30-40 high
if 40-50 very high
above this is not safe for human being, up to 40 is limited for human being

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What are the objectives of NVH (Noise Vibration and Harshness) analysis?..

Answer / sundhara narasimhan

0 dB is the auditory threshold at 1 kHz. Frequency between 2kHz and 4kHz is lowest frequency level that is heard by human.

Human perception level is 0 dB.
Hearing damage during long-term effect is approx. 90 dB.
Hearing damage during short-term effect is approx. 120 dB.
Threshold of pain happens at 134 dB.

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