CEM DT-815 Decibel Sound Noise Level Meter Tester 35-130dB Frequency 31.5HZ-8KHZ, US $124.00 – Picture 0

CEM DT-815 Decibel Sound Noise Level Meter Tester 35-130dB Frequency 31.5HZ-8KHZ, US $124.00 – Picture 1

CEM DT-815 Decibel Sound Noise Level Meter Tester 35-130dB Frequency 31.5HZ-8KHZ, US $124.00 – Picture 2

CEM DT-815 Decibel Sound Noise Level Meter Tester 35-130dB Frequency 31.5HZ-8KHZ, US $124.00 – Picture 3

Cem Dt-815 Decibel Sound Noise Level Meter Tester 35-130db Frequency 31.5hz-8khz

US $124.00

Shenzhen, China
Jan 29th

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My eBay Home About Us View Feedback Contact Us Add To Favourite Store Categories Postage Offers Payment Methods Sign Up Newsletter Add my Store to your Favourites and receive my email newsletters about new items and special promotions! General Interest CEM DT-815 Decibel Sound Noise Level Meter Tester 35-130dB Frequency 31.5HZ-8KHZ N/A Store Home Ask a Question Email a Friend Item Description DT- 815 Sound Level Meter DT- 815 Sound Level Meter is designed for noise project, quality control, illness prevention & cure and all kinds of environment sounds measurements. It is applied to the sounds measurement at factory, school, office, traffic access and household, etc. This unit confirms to the IEC61672-1 class 2 for Sound Level Meter Features: This unit confirms to the IEC61672-1 class 2 for Sound Level Meters MAX & MIN measurements Over range display Under range display A & C Weighting FAST & SLOW response Digit LCD display with a resolution of 0.1dB , bargraph & white backlight Readings memories Specifications: Standard applied IEC61672-1 Type 2,ANSI S1.4 Type2 Level Range LO:30dB~80dB Med:50dB~100dB Hi:80dB~130dB Auto:30dB~130dB Accuracy ±1.4dB Frequency Range 31.5HZ ~ 8KHZ Dynamic range 50dB Time Weighting FAST ( 125mS ), SLOW ( 1s ) Microphone 1/2 inch electret condenser microphone Resolution 0.1dB Reading display update 2 times/sec Bargraph display update 2 times/sec Battery Type 9V Battery NEDA 1604, IEC 6F22, JIS 006P Operation Temp 0?C~40?C(<80%R.H.) Storage Temp -10?C~60?C(<70%R.H.) Accessories: 1 x DT-815 Sound Level Meter 1 x 9V battery, Carrying case and Gift box. 1.Household appliances noise monitoring 2 Test room noise. 3 Residential district, workplace, and laboratory and other environmental monitoring. 4 Audio, home theater volume test. Household Tips: Noise - sound intensity people feel: Intolerable: 150dB ~ 130dB Pain: 130dB ~ 110dB Noisy: 110dB ~ 70dB Quieter: 70dB ~ 50dB Quiet: 50dB ~ 30dB Very quiet: 30dB ~ 10dB Slient: 0dB Noise meter Small knowledge: 1 About dB (A) dB for noise-unit "dB"; A frequency weighting network as a way. National Standard GB / T 2888-2008 the A sound level of definition: sound level meter or the equivalent measuring instruments with this, after the A-weighted noise level measured network called A sound level, the unit symbol dB, expressed as dB (A). 2 About sonic frequency The human ear can hear the sound frequency is 20 ~ 20000Hz, called the audible sound; below 20Hz, called infrasound; than 20000Hz, called ultrasound. High-frequency acoustic sounds sharp, while the low frequency sound feels more boring. Noise from a variety of different frequencies and intensity of sound messy, irregular combination; tones are harmonious sound. Noise frequency can be divided by the sound: <400Hz frequency noise, 400 ~ 1000Hz in frequency noise,> 1000Hz frequency noise. 3 About frequency weighting A Weighting network generally have A, B, C three. A-weighted sound level is to simulate the human ear to 55dB less noise frequency charateristics low intensity; B-weighted sound level is 55dB to 85dB analog moderate-intensity noise frequency charateristics; C-weighted sound level is to simulate high-intensity noise frequency characteristics. The main difference is that the three low-frequency component of the noise attenuation, A maximum attenuation, B second, C minimum. A-weighted sound level due to its characteristic curve close to the sense of hearing charateristics the human ear, so is the world's most widely used measurement noise a, B, C has gradually goes. 4 About time-weighted "fast" and "slow" Slow response: Header time constant 1000ms, - like for measuring the steady state noise, the measured value is valid. Rapid response: Header time constant 125ms, generally used to measure the non-stationary noise fluctuations and transportation noise. Close to the human ear responds to sound. 1 According to the World Health Organization Volume analogy: 190 db lead to death 140 db EU fully defined cause hearing damage to the highest critical point 130 db sound of rocket launchers 125 db sound of jets taking off 120 db in this environment will stay longer than one minute to generate a temporary deafness 110 db sound propeller plane took off, the sound of a rock concert 105 db permanent hearing loss 100 db sound pressure rig, the sound of heavy compression hammer pounding 90 db noisy bar ambient sound, the sound of electric saws sawing wood 85 db and below will not damage the hair cells in the cochlea 80 db noisy office, the voice on the highway 75 db limit human ear Comfort 70 db sound of the street environment 50 db sound normal conversation 20 db whispering 2 Ordinary people hearing: Volume -254 dB absolutely silent universe 0-20 dB very quiet, almost feel; 20-40 dB quiet, like a whisper softly; 40-60 dB in general, common indoor conversation; 60-70 dB noisy, lossy nerve; 70-90 dB noisy, nerve cell damage; 90-100 dB noise intensifies, hearing impaired; 100-120 decibels unbearable, stay for a minute temporary deafness; 120 db above extremely deaf or deaf. 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We supply many products including car black box,computers accessories, car accessories, ip camera, protective case, High product quality, reasonable prices, excellent customer service and a reliable credit standing is our tenet. © 2013-2014 UNACART - All Rights Reserved. On Jun-11-14 at 23:07:24 PDT, seller added the following information:

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	CEM
Country/Region of Manufacture	China
Model	DT-815
Country of Manufacture	China