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Sound Level Meter with PC Interface and Background Noise Filter
Sound Level Meter meets ANSI and IEC 651 Type 2 standards. Ideal for noise surveys in the workplace, installing fire alarms and speaker systems, and enforcing noise ordinances. Measures from 30 to 130 dB in two ranges and has an accuracy of ±1.5 dB. The built-in background noise absorber for machine noise measurements filters ambient noise for more accurate readings. Data hold and Min/Max functions. Backlit display allows use in dimly lit areas. The meter also has an RS232 interface for capturing data directly to your PC using optional Windows compatible software (407752). Complete with microphone windscreen, 9-volt battery, carrying case, and user manual. Model 407732-NIST is also available with a Certificate of Calibration traceable to NIST.
What is a Sound Level Meter?
Sound level meters are instruments designed to respond to noise much like the human ear. The measurements taken by sound level meters are compared to known standards to determine if the noise level could have a detrimental effect on human hearing.
Types of Sound Level Meters
- Type 3 — Low cost models for basic sound checks.
- Type 2 — Models that meet OSHA and other ordinance testing requirements.
- Type 1 — Precision for lab testing (Extech doesn't have one).
- Dosimeters — Measure work noise exposure according to OSHA.
- Analyzer — analyzes noise in narrow bands.
More Extech Instruments to Choose From
407730 Sound Level Meter
Records sound levels from 40 to 130 decibels with ±2 dB accuracy and 0.1 dB resolution. It features a large, 2000 count LCD display with a fast responding analog bargraph for viewing trend. Additional features include: Min/Max, Max Hold, Auto Power off, and an analog AC output for connection to chart recorders and dataloggers. Comes with microphone windscreen, four AAA batteries, and user manual.
407732 Type 2 Sound Meter
Sound Level Meter meets ANSI and IEC 651 Type 2 standards. Ideal for noise surveys in the workplace, installing fire alarms and speaker systems, and enforcing noise ordinances. Measures from 35 to 130 dB in two ranges and has an accuracy of ±1.5 dB. Data hold and Max hold functions. Backlit display allows use in dimly lit areas. Complete with microphone windscreen, 9-volt battery, and user manual. Model 407732-NISTL is also available with a Certificate of Calibration traceable to NIST at a single calibration point to 94 dB.
407732-Kit Sound Level Meter Kit
Type 2 Sound Level Meter Kit meets ANSI and IEC 651 Type 2 standards. Ideal for noise surveys in the workplace, installing fire alarms and speaker systems, and enforcing noise ordinances. Measures from 35 to 130 dB in two ranges and has an accuracy of ±1.5 dB. Data hold and Max hold functions. Backlit display allows use in dimly lit areas. Kit comes complete with 407732 sound meter, 407744 94 dB Sound Calibrator, microphone windscreen, three 9-volt batteries, hard carrying case, and user manual. Model 407732-Kit-NIST is also available with a Certificate of Calibration traceable to NIST which includes 407732-NIST Sound Level Meter and 407722-NIST Sound Calibrator.
407736 Type 2 Sound Level Meter with Calibration Check
Sound Level Meter measures in 2 ranges from 35 to 130 dB with ±1.5 dB accuracy that meets ANSI and IEC Type 2 standards. It features a built-in 94 dB calibration check, fast/slow response time, A/C Weighting, Max Hold, and analog AC/DC output for connection to an analyzer or recorder. Comes complete with microphone windscreen, 9-volt battery, carrying case, and user manual. Model 407736-NIST is also available with a Certificate of Calibration traceable to NIST.
J. Foster
2025-08-27 17:36:20
I have an older DB meter that does straight readings. I was looking for something that I could use for averaging and finding peak volumes so I gave this a try. It's not at all expensive, is easy to use, and seems to work correctly. I have a high end calibrated source for my older meter, and when I tried it on the Extech it read exactly the correct value. So in a static situation the meter is very accurate. While I don't have any way to test it for peak or average readings, I'm guessing that it's probably pretty darn close. I plan on using this for measuring shop machine noise levels, and also for monitoring sound levels for the PA for a jazz band I play in. If you need a DB meter, this one will do a good job at a great price.
Heather S.
2025-07-28 12:59:49
I purchased this as a gift for an engineer, knowing how much he likes data. He LOVES it.If you purchase it new in packaging, it comes with batteries, which was a nice bonus, and the windscreen does help when you're in an area with gusting a/c or things moving. He did say that it might read just a tiny bit high, but not so much that you can't get accurate readings. He's been playing with it all week testing everything from car highway noise to heavy duty machinery at work and has found that it reads quickly, accurately and the memory function is quite useful. It's a "nice blend of not too sensitive and sensitive enough to work well".I would highly recommend the meter, considering how much fun he's had with it. Great buy!
Wind Sock @ RedTop Landing
2025-06-27 14:26:56
So far this meter seems to be working alright enough. We have used this on numerous occasions: checking noise level of a window air conditioner to determine if there was any way to dampen the noise level via adding various barriers around window; checking noise level of mowers, tractor, and weed eaters - though we always wear some sort of protective ear gear (plugs or muffs). By measuring equipment we use /have on hand, this gives us a more realistic idea as to what level of noise reduction we want to target / pay for with future replacement or other "noise producing" equipment. I could use this in my business, as I believe the quality is sufficient for the purposes of a very "limited" sound survey.
Pard
2025-06-19 12:39:34
This Extech 407730 decibel sound meter is easy to use right out of the box and it works very well. The instructions are simple and easy to understand and everything worked as expected. I had never owned or used a sound meter before, so I wasn't sure what to expect, and someone told me it can be complicated, but it's "So simple a child could do it", to quote Dr. Leonard "Bones" McCoy from the original Star Trek (Spock's Brain episode)!Having both the "A" and "C" ratings available to use is a good thing -- make sure you know which one you should use for your particular application (I did some basic web research to learn more). It measures 40 dB to 130 dB, and I was surprised to find that 43 dB is about my basic background noise in my yard, no wind but birds chirping.Also, the "Max Hold" function is great; it keeps the highest rating on the display so if you mount the meter remotely, you can still see what it recorded.I mounted it on a basic camera tripod and it worked fine. It actually has a metal tripod mounting thread, unlike some (expensive) digital cameras that use plastic.The only nits I can pick are: 1) The little foam wind sock that sticks over the end is pretty flimsy and it comes off too easily, but not a biggie; and 2) The battery cover is attached with a tiny Phillips head screw, rather than having a cover that simply snaps on. So you'll need to find a very small #3 Phillips head screwdriver just to remove the batteries, and let's hope you don't have to do this at night or in the bush.It seems well made for what it is -- basic plastic case and slightly mushy rubberized push buttons. The display is easy to read (not sure if it has a light, I only used it during the day).Once you familiarize yourself with the instructions, you pretty much don't have to bother with them again, it's that easy to use. The batteries are the el cheapo type that probably have about 25% of the lifespan of a good pair, but otherwise, this is a very nice unit that's probably way overkill for just recording the neighbor's late night parties. I used it for a basic scientific research project and published the results and it worked fine for that.
B. Li
2025-05-15 12:51:21
Bought this for 5-6 times more than those low end products expecting to get a high quality one. But no, just the opposite. It worked out of box for about 20 minutes then the reading went on its own and did not response to any sound anymore. Also it seems cheaply manufactured - metal part looks dull and plastic parts are roughly fit. I am packing it for a return. Will try a different brand other than Extech.
James B.
2025-03-21 11:47:32
I got this a few days ago and its an incredible meter. first, it uses the much cheaper AAA batteries vs the expensive 9 volt batteries. I have a callibrator and it measured right on when I got it. the instruction manual doesnt tell how to calibrate it but the online manuael at extech does show you how. this meter is a very accurate CLASS 2 meter, a CLASS 1 is better but costs $700+ dollars. this meter can be used in court procedings and government monitering. a UNCLASSIFIED meter that costs under $100 or so is not nearly as accurate as a class 1 or class 2. ( class 1 & 2 is slightly better meters than TYPE 1 and 2 meters). this meter does A and C weighting, peak measurments, and max and minimum measurements over time. the ONLY thing I dont like? its only backlit for 10 seconds after pushing the button. for $126 for a class 2 meter from a top company like extech its the best sound level meter you will find. spend the $126 on this meter plus a $110-$150 for a class 1 calibrator like I bought on amazon and you will be set for years of accurate sound level measurements. dont bother with the $20-$80 meters if you want true readings.
Gilbert Caillouet
2025-03-18 18:24:51
Works as advertised. Surprised to discover how noisy my recording room really is! Cheers
Customer
2025-03-01 13:47:16
This meter is very easy to se and a great size for use on a job site.
Rosa Elia
2025-02-27 14:49:13
El instrumento llego antes de lo esperado eso estuvo excelente.Hablando del instrumento, llego muy bien empacado el único detalle es que no traÃa protector la pantalla y estaba un poco rayada.De ahà en fuera coincide con el instrumento descrito en la publicación.
GV
2025-02-25 16:53:26
preis leistung ist in ortnung
Rod Sheridan
2024-12-26 18:02:23
I purchased this meter because it has both an “A†and “C†weighting response ( I needed the C weighting}.The meter works well and the display is easy to read.
ian
2024-12-20 15:49:56
Has made my movie listening far better after using this to dial in my 5.1.4 Atmos setup
Brad
2024-11-26 15:44:22
Piece of crap. It records data nicely but I'm showing a flat line. I've got another decibel meter that seems to work fine, when I used the Extech even in real time it picked up no sounds. Useless to me. I'll be returning it.
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