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Home > Site safety helmet orange

Site safety helmet orange

Shanghai Sunland Industrial Co., Ltd is the top manufacturer of Personal Protect Equipment in China, with 20 years’experience. We are the Chinese government appointed manufacturer for government power,personal protection equipment , medical instruments,construction industry, etc. All the products get the CE, ANSI and related Industry Certificates. All our safety helmets use the top-quality raw material without any recycling material.

Why choose us

Solutions to meet different needs

Solutions to meet different needs

We provide exclusive customization of the products logo, using advanced printing technology and technology, not suitable for fading, solid and firm, scratch-proof and anti-smashing, and suitable for various scenes such as construction, mining, warehouse, inspection, etc. Our goal is to satisfy your needs. Demand, do your best.

Highly specialized team and products

Highly specialized team and products

Professional team work and production line which can make nice quality in short time.

We trade with an open mind

We trade with an open mind

We abide by the privacy policy and human rights, follow the business order, do our utmost to provide you with a fair and secure trading environment, and look forward to your customers coming to cooperate with us, openly mind and trade with customers, promote common development, and work together for a win-win situation.

24 / 7 guaranteed service

24 / 7 guaranteed service

The professional team provides 24 * 7 after-sales service for you, which can help you solve any problems

Certificate of honor


CONTACT USCustomer satisfaction is our first goal!

Consultation hotline:0086-15900663312

Address:No. 3888, Hutai Road, Baoshan District, Shanghai, China

Site safety helmet orange

Harmful Noise Levels

Harmful Noise Levels

A sound's loudness is measured in decibels (dB). Normal conversation is about 60 dB, a lawn mower is about 90 dB, and a loud rock concert is about 120 dB. In general, sounds above 85 are harmful, depending on how long and how often you are exposed to them and whether you wear hearing protection, such as earplugs or earmuffs.

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Sound Insulation - Clay Masonry Walls

Sound Insulation - Clay Masonry Walls

corresponding to the faintest sound a human ear can hear (0 dB). However, a difference of 3 or less dB is not. especially significant, because the human ear cannot detect a change in sounds of less than 3 dB. Figure 1 shows the intensity level of common sounds on …

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Earplug & Noise Reduction Ratings Explained

Earplug & Noise Reduction Ratings Explained

This means that if you are at a rock concert with a level of noise exposure at 100 ,dB, and you are wearing a hearing protector with an NRR 33 ,dB,, your new level of noise exposure is 87 ,dB,. If you are wearing a product with an NRR of 27 it would deduct 10 decibels (27-7/2=10).

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Best Shooting Ear Protection – | Top 10 REVIEWS – Nov 2020

Best Shooting Ear Protection – | Top 10 REVIEWS – Nov 2020

While taking shots, our delicate auditory organs are hit by a gush of sound waves that could range from an astounding 140 dB to 190 dB, far higher than the human tolerance level of 80dB. This explosive sound, transferred through the air and bodily vibrations, should be controlled by ear muffs or earplugs to avoid permanent ear damage and other health hazards.

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How to Choose Shooting Earmuffs: Selection Guide

How to Choose Shooting Earmuffs: Selection Guide

How to Choose Shooting ,Earmuffs,: Selection Guide. Did you know the ,sound, of gunfire is the most hazardous non-occupational noise that Americans are exposed to? It's possible that a single shot with an unprotected ear can lead to immediate and permanent hearing loss, often accompanied by tinnitus (ringing, hissing, or humming in the ears).

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Active soundproof earmuffs system with passive noise ...

Active soundproof earmuffs system with passive noise ...

1/8/2020, · It reduces to 83 dB and 75 dB respectively before and after turning on ANC subsystem without PNC structure compensation. It could reach about 17.5 dB noise reduction for 100 Hz–1 kHz pink noise, which reveals overall noise is declining after implementing active noise reduction in the earmuff cavity.

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Newest Anti-noise sound insulation earmuffs Prevent noise ...

Newest Anti-noise sound insulation earmuffs Prevent noise ...

Newest Anti-noise ,sound insulation earmuffs, Prevent noise sleep: Amazon.in: Home Improvement. Skip to main content.in Hello, Sign in. Account & Lists Account Returns & Orders. Try. Prime Cart. Tools & Home Improvement. Go Search Hello Select your ...

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Harmful Noise Levels | Michigan Medicine

Harmful Noise Levels | Michigan Medicine

A sound's loudness is measured in decibels (dB). Normal conversation is about 60 dB, a lawn mower is about 90 dB, and a loud rock concert is about 120 dB. In general, sounds above 85 are harmful, depending on how long and how often you are exposed to them and whether you wear hearing protection, such as earplugs or earmuffs.

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11.4.5 Measurement Indices 11.5.6 Airborne Sound ...

11.4.5 Measurement Indices 11.5.6 Airborne Sound ...

This ,average, of ,insulation, values, measured in ,dB,, is a simple indicator of a products ,sound insulation, performance. Weighted ,Sound, Reduction Index (R W ) The weighted ,sound, reduction index is now the most common index used internationally since its adoption in the BS and ISO standards.

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How to Choose the Best Hearing Protection

How to Choose the Best Hearing Protection

The idea is to get the noise reduced to a safe and comfortable level; for a two-hour stint in your workshop, that should be less than 90 ,dB,. Foam plugs offer an NRR of about 30 ,dB,; ,earmuffs, about 25 ,dB,; molded plugs slightly less than 25 ,dB,. For extremely loud operations, wear both plugs and muffs to attain an NRR of 35 ,db, or more.

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