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13:45 Nov 19, 2020 |
English to French translations [PRO] Tech/Engineering - IT (Information Technology) / boîtier d\'ordinateur | |||||||
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| Selected response from: Emmanuella Italy Local time: 22:51 | ||||||
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The sounds of silence |
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fonctionnement ultrasilencieux Explanation: ... |
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48 mins confidence:
3 hrs confidence:
10 hrs confidence: peer agreement (net): +1
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9 hrs |
Reference: The sounds of silence Reference information: LIPOSUCTION MACHINES What is the best liposuction aspirator for you? All lipo aspirators reach the same negative pressure (-29.6 inches of mercury at sea level), but it is the Flow Rate that differentiates each system and determines the speed of the procedure. Our smallest unit, the Touch-Up, has a flow rate of 2.5 CFM whilst the RM2000 and the LS2 have a massive 5 CFM. These aspirators are the leaders in quiet high-powered liposuction aspirator technology with high vacuum and airflow rates to satisfy your exacting needs. The MD Touchup is our lowest price point aspirator - easily portable and great for small jobs (1 Year Warranty) The RM 2000 is our perfect mid-range machine. It provides whisper-silent operation at only 42 +/-dB @ 3ft https://www.precisemedical.com.au/collections/liposuction-ma... Decibels (dB) The ear has the remarkable ability to handle an enormous range of sound levels. In order to express levels of sound meaningfully in numbers that are more manageable, a logarithmic scale is used, rather than a linear one. This scale is the decibel scale. What is a decibel? Zero decibels (0 dB) is the quietest sound audible to a healthy human ear. From there, every increase of 3 dB represents a doubling of sound intensity, or acoustic power. https://www.noisehelp.com/decibel-scale.html Between 0 dB and 42 dB there is quite a difference - 42 dB is hardly anywhere near real "silence", as shown by this scale: decibels intensity* type of sound *In watts per square metre. 130 10 artillery fire at close proximity (threshold of pain) 120 1 amplified rock music; near jet engine 110 10−1 loud orchestral music, in audience 100 10−2 electric saw 90 10−3 bus or truck interior 80 10−4 automobile interior 70 10−5 average street noise; loud telephone bell 60 10−6 normal conversation; business office 50 10−7 restaurant; private office 40 10−8 quiet room in home 30 10−9 quiet lecture hall; bedroom 20 10−10 radio, television, or recording studio 10 10−11 soundproof room 0 10−12 absolute silence (threshold of hearing) https://www.britannica.com/science/sound-physics/The-decibel... -------------------------------------------------- Note added at 10 hrs (2020-11-19 23:59:18 GMT) -------------------------------------------------- The table below shows dB levels and how noise from everyday sources can affect your hearing. Everyday Sounds and Noises Average Sound Level (measured in decibels) Typical Response (after routine or repeated exposure) Softest sound that can be heard 0 Sounds at these dB levels typically don’t cause any hearing damage. Normal breathing 10 Ticking watch 20 Soft whisper 30 Refrigerator hum 40 Normal conversation, air conditioner 60 Washing machine, dishwasher 70 You may feel annoyed by the noise City traffic (inside the car) 80–85 You may feel very annoyed Gas-powered lawnmowers and leaf blowers 80-85 Damage to hearing possible after 2 hours of exposure Motorcycle 95 Damage to hearing possible after about 50 minutes of exposure Approaching subway train, car horn at 16 feet (5 meters), and sporting events (such as hockey playoffs and football games) 100 Hearing loss possible after 15 minutes The maximum volume level for personal listening devices; a very loud radio, stereo, or television; and loud entertainment venues (such as nightclubs, bars, and rock concerts) 105–110 Hearing loss possible in less than 5 minutes Shouting or barking in the ear 110 Hearing loss possible in less than 2 minutes Standing beside or near sirens 120 Pain and ear injury Firecrackers 140–150 Pain and ear injury The time estimates listed in the “Typical Response” https://www.cdc.gov/nceh/hearing_loss/what_noises_cause_hear... |
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