Noise standard

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Urban area environmental noise standard

Newly built, expanded or rebuilt enterprise noise standards

Noise Standards for Various Locations in Industrial Enterprises

Existing corporate noise standards

The main construction machinery construction site noise average A sound level meter

Urban area environmental noise standard [ Unit: equivalent sound level, decibel ( A ) ]

A is the sound level, denoted as decibel ( A ) or dB ( A ). Sound level is different from sound pressure level. The sound level represents the sound pressure level after frequency weighting, and acoustic instruments equipped with A , B , and C weighted networks. Its reading is called sound level and the unit is also decibel. In recent years, people often use noise measured in the A network to measure the noise loudness called A sound level.

Description: 1) This table is taken from "Urban Area Environmental Noise Standard" (GB3096-82) 2) refers to the special needs of special residential quiet residential area; residential, cultural and educational areas and cultural and educational means pure residential area, authorities zone; a class The mixed area refers to the mixed commercial and residential areas; the mixed area refers to the mixed areas of industry, commerce, and a small amount of traffic and residents; the commercial area refers to the busy areas where the business is concentrated; and the industrial concentrated area refers to the planning within a city or area. A clearly defined industrial zone; on both sides of the main road , traffic is on both sides of the road with an average flow of more than 100 vehicles per hour.

Applicable area night time

Special residential area 4535

Residents, Culture and Education District 5040

A type of mixed area 5545

Commercial center area, type 2 mixed area 6050

Traffic trunks on both sides of the road 7055

Newly built, expanded or rebuilt enterprise noise standards

Explanation: This is an excerpt from "Noise Hygiene Standard for Industrial Enterprises" (Trial Draft)

Per-working day noise time ( h ) Allowable noise, dB ( A )

885

488

291

194

Noise Standards for Various Sites in Industrial Enterprises

Explanation:

1. The noise levels listed in this table should be measured and determined according to the current national standards;

2. For the occasion where the workers are exposed to noise less than 8 hours per day , the noise limit value can be determined based on the actual contact noise time, and the principle that the contact time is reduced by half and the noise limit is increased by 3dB ;

3. The indoor background noise level listed in this table is the indoor average noise level introduced into the room through the wall, doors, and windows (doors and windows opening and closing conditions are conventional) under the conditions of indoor silent sound.

Location Type Production Workshop and Workplace (Worker's Contact Noise Every Day in the Frontier 8h )

Noise Limit ( dB ) 90

Location Category Noise Room Workshop, Observation Room, Lounge ( Interior Background Noise Level ) When No Telephone Communication Required

Noise Limit ( dB ) 75

Location Category Noise Room The duty room, observation room, and rest room ( indoor background noise level ) set when there is a telephone communication request

Noise Limit ( dB ) 70

Location Category Precision Assembly Lines, Workplaces of Precision Machining Workshops, Computer Rooms ( Normal Operation )

Noise Limit ( dB ) 70

Location Category Workshop Office, Laboratory, Design Office ( Interior Noise Level )

Noise Limit ( dB ) 70

Location Category Main Control Room, Central Control Room, Communication Room, Telephone Exchange Room, Fire Service Room ( Indoor Noise Level )

Noise Limit ( dB ) 70

Location Type Factory Office, Conference Room, Design Office, Central Laboratory ( Including Test, Laboratory, Measurement Room ) ( Interior Noise Level )

Noise Limit ( dB ) 60

Existing Enterprise Noise Standard Description: This is an excerpt from "Noise Hygiene Standard for Industrial Enterprises" (Trial Draft)

Per-working day noise time ( h ) Allowable noise, dB ( A )

890

493

296

199

The main construction machinery construction site noise average A sound level meter

Note: The data listed in the table are all measured at a distance of about 15m from the noise source . The noise level of the on-site operator is also 10-20dB .