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  • Extech 407730 40-to-130-Decibel Digital Sound Level Meter
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Extech 407730 40-to-130-Decibel Digital Sound Level Meter

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List Price: $89.99
Price: $71.51 & FREE Shipping. Details
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Standard
  • Measures 40 to 130dB on digital display
  • 2dB accuracy with 0.1dB resolution
  • Fast responding analog bar graph
  • Records Max/Min values over time
  • Auto power off and Max Hold function
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Frequently Bought Together

Extech 407730 40-to-130-Decibel Digital Sound Level Meter + Dr.Meter Digital Illuminance/Light Meter LX1330B , 0 - 200,000 Lux Luxmeter + Mini Digital Sound Level Meter
Price for all three: $131.49

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Product Information

Style Name: Standard
Technical Details
Part Number 407730
Item Weight8.8 ounces
Product Dimensions9 x 1.7 x 2.2 inches
Item model number407730
Batteries:4 AAA batteries required. (included)
ColorWhite
StyleStandard
Item Package Quantity1
Batteries Included?Yes
Batteries Required?Yes
Warranty Description1 year parts and labor
  
Additional Information
ASINB000EWY67W
Best Sellers Rank #8,260 in Home Improvement (See top 100)
Shipping Weight8.8 ounces (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableMarch 8, 2006
  
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Product Description

Style: Standard

Amazon.com

Whether you're monitoring workplace machinery, installing audio or alarm systems, or handling product noise certification and reduction, the Extech Digital Sound Level Meter gets the job done. This meter accurately monitors sound levels in a range from 40 to 130 decibels. It displays results in the large LCD display in two different ways, either by number or a fast-responding analog bar graph. The lightweight meter easily fits in your hand and can be used wherever you need it.

Extech Logo
Digital Sound Level Meter
At a Glance:
  • Records sound levels from 40 to 130 decibels

  • Precise readings with +/-2 dB accuracy and 0.1 dB resolution

  • Large LCD display with both number and analog graph readings

  • Records sound values over time to track sound changes

  • One-year limited warranty on parts and labor
At a Glance
Extech 407730 Digital Sound Level Meter
Fast-responding analog bar graph with
50 dB range shows trends. View larger.
Accurately Measures Sound Levels
Wherever you need to monitor sound levels, the Extech sound meter will do the job. The meter utilizes a 1/2-inch electric condenser microphone to monitor sound levels from 40 to 130 decibels at an accuracy of +/-2 dB with a 0.1 dB resolution. A windscreen is included to prevent distortion in the readings. User-friendly settings allow you to choose between either A or C weighting. The unit also mounts on a tripod, providing convenient hands-free readings.


Extech 407730 Digital Sound Level Meter - Windscreen
Included windscreen prevents distortion.
Large LCD Screen with Dual Reading Displays
The large, 2,000-count LCD display gives readings in large, clear numbers. At the same time, it shows the sound level readings using a fast-responding analog bar graph with a 50-decibel range that updates every 40 milliseconds for viewing varying trends. The unit has AC analog output and records max/min values over time.

Compact, Lightweight Design
The Extech sound meter weighs less than 6 ounces, and is designed to fit comfortably in the palm of your hand. The meter is white with a black-framed screen and black buttons. Useful features include auto power-off, max hold functions, and fast/slow response time.

Product and Warranty Information
All of Extech's assessment tools are factory calibrated to specifications and work to spec. You can also add an NIST calibration certificate for audits if necessary for licensed testing. The meter measures 9 by 2-1/5 by 1-7/10 inches (H x W x D), and uses four AAA batteries.

The Extech Digital Sound Level Meter is backed by a manufacturer's one-year limited warranty on parts and labor.

What's in the Box
Meter, microphone windscreen, four AAA batteries, and user manual.


Product Description

Extech 407730 40-to-130-Decibel Digital Sound Level Meter

Customer Questions & Answers

Customer Reviews

We recommend the Digital Sound Level Meter.
7 Zion
This Db meter is very easy to use and I especially like the max hold button so I can drive the car for a while then check the max Db reading.
Karl Mckeever
This Extech 407730 decibel sound meter is easy to use right out of the box and it works very well.
Pard

Most Helpful Customer Reviews

123 of 123 people found the following review helpful By Pard on August 29, 2008
Style Name: Standard Verified Purchase
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).
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45 of 46 people found the following review helpful By Thomas (Sherri's husband) on February 24, 2013
Style Name: Standard Verified Purchase
I'm a long time sound meter user, for the purpose of setting up a Home Theater listening system of fifteen plus years.

Before "upgrading" to this unit, I was using a Radio Shack, digital sound meter, the standard on many Home Theater forums. I wanted better because like most, better is, well, just better; security in knowing you're using better.

Buyer beware: this is not a spec'd sound level meter. There are four types of sound meters; lab grade type 0, field/lab grade Type 1, professional general field use Type 2 and the unspecified Type 3 with the lowest calibration standards for general survey work to see if one needs a better quality sound meter. This unit qualifies as a Type 3 as there's no mention in the provided data sheet of this unit being of any type. This is very important if one is going buy and use this unit for required spec'd measurements such as OSHA, lab, legal or law enforcement.

Overall, my first impressions were, how light it was. Yes, I'm human and I like my gear to have some heft to it. Along with this sound meter, I purchased a sound meter calibrator. Beware, the first thing I did when calibrating this unit, I pushed the side mounted calibration wheel into the casing and had to take the case apart to "bend" the potentiometer, back into place. Not a good sign. The adjustment feature needs to be better secured as I'm a careful user of gear and from my experience, this shouldn't have happened. It's fixed, you've been warned, life is good.

Moving forward, the meter reading is what I would characterize as unstable (even on slow, the readings flicker too much) and with a noise threshold of >40dB, does not go low enough for in room measurements.
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34 of 35 people found the following review helpful By Michael Burk on December 16, 2009
Style Name: Standard Verified Purchase
I recently entered a contest sponsored by Lockheed Martin called Silent Stamina where the objective was to design and build a model airplane that would fly the longest time and not produce more than 60 db at full throttle.

This was the cheapest sound level meter I found with an accuracy of +/- 2%.
My meter read about 1.5db to 2db below the contest directors meter, close enough.
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36 of 40 people found the following review helpful By Dutch Treat on February 8, 2008
Style Name: Standard
I use this meter to take OSHA readings in our plant. It is great to show the workers how loud it actually is and helps them with wearing ear protection more consistent.
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36 of 42 people found the following review helpful By Thomas R. Stone on February 26, 2011
Style Name: Standard Verified Purchase
I have had to send two of these back for the same reason. When I returned the first one, the company said it must have been a defective unit, but the replacement one does the same thing.

The problem is that the MIN/MAX function does not work properly. Even when recording very steady sine wave acoustic signals well within the device's measurement range, the unit often reports that the MAX signal value encountered during the recording period was too LO to be recorded. And about as often, that the MIN signal level encountered was too HI to be recorded. This obviously makes no sense, and points to a problem with the device's data acquisition or a software bug.

If you just want to look at the numbers flickering by and make a guess about maximum, minimum, and average values over a time period, this might work for you, but for any serious quantitative engineering or scientific work, forget it. It's a hobbyist level tool at best, not a professional tool.
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