Noise

Noise(So it is) with, being noisy, you feel displeasure sound.Environmental fundamental lawSo it is one of the typical seven pollution which is defined,Environmental standardIs set.

Whether or not the sound noise the judgement is something which is subjective feeling of the person, being desirable sound for a certain person, there are also times when it is recognized noise for the other person.

For example when being intensive on study and book-reading etc., from outside it is audible plain gauze ぎ voice and the like you are moved by noise. Generally large sound andDissonanceAnd so on it is audible in noise, but you feel what noise concretely, it differs depending upon the psychological state and the like of the individual.

You hear directly in the ear of the person and taking you are not possibleIt is low frequencySound of limits,It is low frequency soundWith it calls, distinguishes with usual noise.

As for unit of A-weighted sound pressure level decibel.

The influence which noise gives to the human body

• The psychological unpleasant impression, nervous
• Sleep disturbance
• Hearing impairment
• Decrease of concentration

(Stub)

It depends on noisePollution(Noise pollution)

Occurrence source

• traffic
  • automobile
  • railroad
  • aircraft
• FactorySomething related to machine
• Engineering works construction actual place
• Karaoke
• advertisement and election、Right wing groupAnd so on loudspeaker
• NeighborhoodDog、Cat、 television、 radio、 piano、 air conditioner

Related item

• Sound arresting speaker
• Vibration
• Manager in charge of pollution control
• Increase equivalent average feeling A-weighted sound pressure level
• A quality、F quality
• Dynamic characteristic

External link

• About the environmental standard which relates to noise
• About the environmental standard which relates to Shinkansen railroad noise
• About the environmental standard which relates to aircraft noise
• Noise regulation law
• Preventive measure of influence and noise characteristic hearing impairment to human body of noise
• Corporation Japanese noise system control engineering meeting
• Corporation Japanese acoustic academic society

This item "Noise"There is a possibility of becoming reference of something to investigate, but stillItem of writing applyingIs.Revision and correctionAnd so on the cooperator doing is sought.