Online decibel meter

BrandREED Instruments. ModelR8060. Weight1 pounds. Pros. The most accurate decibel meter on this list. Can get it with NIST certification, which is necessary if you’re using the reading in court. The digital and analog recordings make it easy to read fluctuating noise. Cons.

Online decibel meter. Decibel meters are basically useless for headphones unless you get some kind of reference device cheapest being a MiniDSP EARS at 240. Better to figure it out electrically. Or assume you are listening too loud in general. They test headphone speakers the same way they test larger speakers.

Nov 2, 2023 · Then select Noise Meter. Set a noise limit using the sensitivity bar, turn on the microphone of your device, and you’re ready to go. 7. Noise ‘O’ Meter. Scratch/Noise’O’Meter via scratch.mit.edu. How it works: This is basically a coding project created using the popular coding platform Scratch.

The SL510 is extech’s ultra-compact sound meter which meets class 2 standards with ±1dB high accuracy. Allows for Quick and reliable sound level testing. It features a large backlit display for easy viewing and measures a & C weighting from 35 to 130dB with fast and slow response time mode. Size is small enough to conveniently fit in …Key Takeaways: Sounds above 80 dB can cause hearing damage, and we should limit the exposure to prevent hearing loss. Decibel apps are a convenient way to …The outdoor decibel meter PCE-428-EKIT is an optimal sound level meter for measurements at workplaces, construction sites, in traffic, airports, etc. The decibel meter is a class 2 device and is equipped with an octave band frequency filter. Optionally, the decibel meter PCE-428-EKIT can be upgraded with a 1/3 octave band filter. Decibel Meter, TopTes TS-501B Sound Level Meter with 2.25” Backlit LCD Screen, Portable SPL Meter with A/C Weighted, Range 30-130dB, MAX/MIN, Data Hold, Use for Home, Noisy Neighbor, Factory - Orange. 817. 600+ bought in past month. $2999. Save 10% with coupon. Sper Scientific’s Bluetooth Sound Meter is small, light, and simple to use with results clearly displayed on the meter’s large 1-½” backlit display. Choose A or C decibel frequency weighting scales and manual or auto ranging. Indicates readings over or under range and features minimum and maximum hold (peak) and data hold functions.

Decibel Meter, TopTes TS-501B Sound Level Meter with 2.25” Backlit LCD Screen, Portable SPL Meter with A/C Weighted, Range 30-130dB, MAX/MIN, Data Hold, Use for Home, Noisy Neighbor, Factory - Orange.Wintact WT85B Sound Level Meter Digital Decibel Meter Digital Noise Meter Environmental Noise Tester WT85B Black. ₦ 76,210. ₦ 108,871. 30%. Add To Cart. Shipped from abroad. SW526A Wall-mounted 30~130dB Noise Decibel Monitoring Tester SW526A 18 Inch Display. ₦ 421,860. ₦ 602,657. 30%.How loud is your environment? Understanding this is crucial, and a decibel meter is the key. These tools measure sound levels in decibels (dB), essential for …From the research I did at the time, it was the most accurate currently available. https://apps.apple.com/gb/app/splnfft-noise-meter/id355396114. When I’ve tested …Sound Meter. With 10+ million installations, Sound Meter from ABC Apps is free, simple to use and continuously measures noise levels in an easily understood graphic display. The readout rates sound levels ("air conditioner," "talking," "quiet place," "silent place") until you touch the "Sound/Measure" icon. It earned 5/5 stars.

Photo: A noise-measuring meter—technically called a sound pressure level (SPL) meter— tells you how noisy something is by measuring how much the sound …Apr 9, 2014 · The use of smartphone sound measurement apps can have a tremendous and far-reaching impact in the areas of noise research and noise control in the workplace as every smartphone can be potentially turned into a dosimeter or a sound level meter [Maisonneuve et al., 2010; Williams and Sukara, 2013]. However, in order for smartphone apps to gain ... Receptors (e.g. sound level meters) measure the "sound pressure level" (Lp), a decibel value of the sound by a source at a distance. The source of sound itself is calculated with a "sound power level" (Lw). This is a decibel value …Jul 21, 2023 · Decibel Pro app Decibel Pro: dB Sound Level Meter. iTunes rating: 4.7 stars. Measure noise at home or in the workplace and calibrate home or professional audio equipment with this free app which includes a noise dosimeter, spectrum analyzer with RTA, FFT and Spectogram, as well as a hearing test. Sound Meter (Noise Detector) iTunes rating: 4.6 ... REED Instruments R8050 Sound Level Meter Type 2. This was one of the most accurate decibel meters we found. It measures to within 1.4 dB so you know exactly how loud your environment is. The decibel meter has a …

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Sound Meter (Noise & Decibel) 2.9 (19) Average rating 2.9 out of 5. 19 ratings. Google doesn't verify reviews. Learn more about results and reviews. Measure the surrounding sound (dB) and noise with your computer's microphone! Medallia DXA Extension. 4.8 (12) Average rating 4.8 out of 5. 12 ratings.B&K 2250 SOUND LEVEL METER/ANALYZER. B&K 2250 series delivers powerful single-channel class 1 sound level meters and hand-held analyzers. The instruments can be easily extended with the B&K quality range of microphones and measurement kits. Important update: The B&K 2250 series will be transitioned to the B&K 2245 and HBK 2255 …Buy Decibel Meter, Tadeto Digital Sound Level Meter Portable SPL Meter 30dB to 130dB(5 Measurement Range) Backlight LCD Display, MAX/MIN Noise Measurement, Audible and Visual Alarms,Data Hold, A/C Mode: Sound & Noise Meters - Amazon.com FREE DELIVERY possible on eligible purchasesDec 13, 2023 · Extech 407730. As a prominent manufacturer in the automation and controls industry, Extech put their advanced technology to work in this affordable, but professional-grade sound level meter. The Extech 407730 is available in two different options. The singe range model – our primary choice – can measure sound levels between 40 and 130 decibels. Description. Track environmental noise around you with this easy-to-use decibel meter app with detailed visual analysis. The Decibel Meter app uses the built-in microphone to determine the level of sound it detects and displays it in decibels (dB). The microphone audio data is used to calculate dB (Decibels) / AF (Audio Frequency) readings for ...

A classroom management tool to show noise level. Use your built-in microphone or plug in your USB microphone to enable this groovy noise level monitor. Adjust the microphone sensitivity to suit your microphone and classroom, …90 decibel = Likely hearing damage if sustained for more than 8 hours. 80 decibel = Potential but unlikely hearing damage if sustained for more than 8 hours. 70 dB = Just annoying, but probably safe. 60 dB= Typical conversational volume. 50 dB = A quiet, library conversation. 40 decibel = A whisper. 30 dB= Barely audible sound.Sound Meter HQ. This is a noise level app that measures the sound level of your surroundings using your phone’s built-in microphone. The app displays the decibel level on the screen, along with a gauge that indicates the level of noise. It can measure sounds within the range of 0-140 dB and also displays the minimum and maximum …Decibel Meter Sound Level Reader 30-130dB(A), Hand-held Sound Noise Meter with Backlight Alarm, Digital Noise Meter Decibel Monitoring Tester Calibrated Audio Noise Volume Measuring Instrument. 4.3 out of 5 stars. 630. 400+ bought in past month. $17.97 $ 17. 97. List: $24.99 $24.99.Peak hold, Data hold and Min/Max hold. The single AC output jack (3.5mm stereo mini-plug) provides analog signals to frequency analysers, level recorders, FFT analysers, graphic recorders, etc. Includes sound level meter, windshield ball, hard carrying case and batteries. Real-time data logger with integrated SD memory card. The … General guidelines on how to use a sound level meter: place the sound level meter at a sufficient distance from any obstacles or reflectors. place the microphone of the sound level meter about 1,3 - 1,5 m above the ground. place the microphone of the sound level meter in the direction of the sound source. The measurements of a decibel meter ... Receptors (e.g. sound level meters) measure the "sound pressure level" (Lp), a decibel value of the sound by a source at a distance. The source of sound itself is calculated with a "sound power level" (Lw). This is a decibel value …4) Sound Meter – Decibel. Our pick for fourth best dB meter is “Sound Meter – Decibel.” This app has an awesome user interface and several different ways to display the dB’s it is reading.Peak hold, Data hold and Min/Max hold. The single AC output jack (3.5mm stereo mini-plug) provides analog signals to frequency analysers, level recorders, FFT analysers, graphic recorders, etc. Includes sound level meter, windshield ball, hard carrying case and batteries. Real-time data logger with integrated SD memory card. The …Noise Decibel Meter, Gedaye Sound Level Meter Range 35-135dBA, SPL Meter with A Weighted, Data Hold Max/Min, Fast/Slow, Color LCD Backlit Display, Noise Detector dB reader Monitor Audio Measure Device . Brand: Gedaye. 4.6 out of 5 stars 39.Jun 21, 2023 · A sound level meter, also known as a decibel meter or noise level meter, is a device used to measure the intensity of sound in a given environment. It is commonly used in various industries, including construction, manufacturing, and entertainment, to assess and monitor noise levels. The main purpose of a sound level meter is to quantify sound ...

Sound Meter. With 10+ million installations, Sound Meter from ABC Apps is free, simple to use and continuously measures noise levels in an easily understood graphic display. The readout rates sound levels ("air conditioner," "talking," "quiet place," "silent place") until you touch the "Sound/Measure" icon. It earned 5/5 stars.

Apr 2, 2024 · With this app, you can easily measure the current level of environmental noise. The best helper to detect noise. Sound meter features: - Indicate decibel by gauge. - Display the current noise reference. - Display min/avg/max decibel values. - Display decibel by a graph, easy to understand. - Can calibrate the decibel for each device. All of these factors mean that while sound meter Apps are great for giving an indication of noise levels, they can’t be relied upon for exact sound levels; furthermore, they have no legal standing so can’t be used to support noise complaints. They are good, however, for measuring exposure times and for a quick spot check to give an idea of ...A free classroom noise level meter, monitor and management tool. Perfect if your school kids are too noisy! Bouncing balls react to sounds from the microphone.Protmex Sound Level Meter, Dual Mode db Meter Decibel Meter Noise Level Meter 30-130dB Measure with Fast/Slow Selection, Backlight, Max and Data Hold Function, A/C Mode PT6708(Batteries Included) 4.1 out of 5 stars. 80. $49.99 $ 49. 99. 10% coupon applied at checkout Save 10% with coupon.iPhone Screenshots. DecibelMeter - Noise Meter App makes your iPhone as a sound level meter, it can measure noise level. WHY YOU WILL LOVE DecibelMeter - Noise Meter App. - Very simple & easy to use. - Super quick and accurate dB measuring. - All-in-one meter. - Maximum, current and average values. - A gauge meter displaying values.Decibel Meter, TS-501A Sound Level Meter with 2.25” Backlight LCD Screen, Portable SPL Meter with A Weighted, Range 30-130dB, Data Hold, MAX/MIN, Use for Home, Noisy Neighbor, Factory - Orange. 64. 300+ bought in past month. $2699. Save 10% with coupon. FREE delivery Tue, Apr 30 on $35 of items shipped by Amazon. Or fastest delivery Fri, …Decibels (dB) = 10 * log10(I2 / I1) In each formula, “log10” represents the logarithm base 10 function. For example, if a sound has an intensity of 10^-4 watts per square meter (I2) and the reference intensity is 10^-6 watts per square meter (I1), the intensity in decibels would be calculated as follows:

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Note that decibel meters/sound level meters can go by other names. For instance, another type of tool called a "noise … SmarterNoise is a premium sound level meter app featuring several unique functions. SmarterNoise measures sound levels in video and audio format, records video and sound, and informs you about the risks of noise exposure. In addition, SmarterNoise includes a camera, gps-location, and easy sharing, all for free. With this app, you can easily measure the current level of environmental noise. The best helper to detect noise. Sound meter Pro features: - Indicate decibel by gauge. - Display the current noise reference. - Display min/avg/max decibel values. - Display decibel by a graph, easy to understand. - Can calibrate the decibel for each … Decibel Meter, TopTes TS-501B Sound Level Meter with 2.25” Backlit LCD Screen, Portable SPL Meter with A/C Weighted, Range 30-130dB, MAX/MIN, Data Hold, Use for Home, Noisy Neighbor, Factory - Orange. 817. 600+ bought in past month. $2999. Save 10% with coupon. Use this online sound meter to measure the loudness of environmental noise and check your hearing. Learn how to calibrate the sound meter and headphones, and access other free audio/sound related services. Microphone Sound Analyzer. Δf=2.00 kHz x:undefined,y:undefined 0.0 2.0 4.0 6.0 8.0 10.0 -80 -70 -60 -50 -40 -30 -20 -10 0 f (kHz) audio level (dB) Frequency Spectrum Δt=5.94 ms x:undefined,y:undefined Press play button to start. 0.0 1.2 2.4 3.6 4.8 6.0 7.2 8.4 9.6 10.8 12.0 13.2 14.4 15.6 16.8 18.0 19.2 20.4 21.6 22.8 -0.3 -0.1 0.0 0.1 0.2 0. ...Description. Test if a Noise Source in Your Neighborhood or at Work is Dangerously Loud. The ennoLogic eS528L is a professional sound level meter that provides reliable decibel readings over a range of 30 to 130 dBA with an accuracy of ±1.5dB. The large backlit display is easy to read from anywhere and in any environment.Oct 20, 2022 · We’ve chosen three classroom noise monitor tools that teachers can use for free. 1. Classcraft Volume Meter How it works: Classcraft’s Volume Meter enables teachers to manage their classroom by setting a maximum volume that their students must stay under. As the class makes noise, a horizontal bar fills up, and volume fluctuates in real time. Write to us: [email protected]. DB Chart. 150-160 dB = Eardrum rupture. 140 decibel = Aircraft carrier deck. 130 dB = Jet take-off (100 meters), gun blast at close range. 120 dB= Human pain threshold, loud rock concert. 110 decibel = Serious hearing damage if sustained for more than 1 hour. 140 decibel = Aircraft carrier deck. 130 dB = Jet take-off (100 meters), gun blast at close range. 120 dB= Human pain threshold, loud rock concert. 110 decibel = Serious hearing damage if sustained for more than 1 hour. 100 dB = Serious hearing damage if sustained for more than 8 hours. 90 decibel = Likely hearing damage if sustained for more ... ….

Decibel Meter,Digital Sound Level Meter Portable SPL Meter,35dB to 135dB Temperature Function,Noise Meter with A-Weighted [MAX/MIN Fast/Slow Data Hold], Use for Home, Noisy Neighbor, Factory. 4.3 out of 5 stars 332. $17.99 $ 17. 99. 10% coupon applied at checkout Save 10% with coupon.EarDial App Calibration. The EarDial app is designed to give you an approximate idea of the sound level around you and how long you can stay safely. Keep in mind that your device's microphone won't be as precise as a professional Sound Level Meter. The microphone sensitivity from different device models is slightly different.Mar 29, 2019 · BrandREED Instruments. ModelR8060. Weight1 pounds. Pros. The most accurate decibel meter on this list. Can get it with NIST certification, which is necessary if you’re using the reading in court. The digital and analog recordings make it easy to read fluctuating noise. Cons. Buy Decibel Meter, RISEPRO® Digital Sound Level Meter 30 – 130 dB Audio Noise Measure Device Backlight MAX/MIN, Data Hold Auto Power Off Dual Ranges HT-80A: Sound & Noise Meters - Amazon.com …Check out these highly rated smartphone decibel meter apps – costs vary from free to less than $10 and all are rated more than 4 stars: Apps for both Android & iOS Decibel X. Turns your smartphone into a pre-calibrated, accurate and easily portable sound level meter.A free classroom noise level meter, monitor and management tool. Perfect if your school kids are too noisy! Bouncing balls react to sounds from the microphone.Decibel Meter, TopTes TS-501B Sound Level Meter with 2.25” Backlit LCD Screen, Portable SPL Meter with A/C Weighted, Range 30-130dB, MAX/MIN, Data Hold, Use for Home, Noisy Neighbor, Factory - OrangeDecibel meters are basically useless for headphones unless you get some kind of reference device cheapest being a MiniDSP EARS at 240. Better to figure it out electrically. Or assume you are listening too loud in general. They test headphone speakers the same way they test larger speakers.Octave Band Sound Level Meter – Pulsar Nova 46 (Class 2) Rated 5.00 out of 5. From £ 2,348.00 (Ex. VAT/GST) This premium version of the Pulsar Nova is a Class 2 octave band sound level meter. Compliant with IEC 61672.…. Select options. Online decibel meter, SmarterNoise is a premium sound level meter app featuring several unique functions. SmarterNoise measures sound levels in video and audio format, records video and sound, and informs you about the risks of noise exposure. In addition, SmarterNoise includes a camera, gps-location, and easy sharing, all for free. , Microphone Sound Analyzer. Δf=2.00 kHz x:undefined,y:undefined 0.0 2.0 4.0 6.0 8.0 10.0 -80 -70 -60 -50 -40 -30 -20 -10 0 f (kHz) audio level (dB) Frequency Spectrum Δt=5.94 ms x:undefined,y:undefined Press play button to start. 0.0 1.2 2.4 3.6 4.8 6.0 7.2 8.4 9.6 10.8 12.0 13.2 14.4 15.6 16.8 18.0 19.2 20.4 21.6 22.8 -0.3 -0.1 0.0 0.1 0.2 0. ..., Decibel Meter Sound Level Reader 30-130dB(A), Hand-held Sound Noise Meter with Backlight Alarm, Digital Noise Meter Decibel Monitoring Tester Calibrated Audio Noise Volume Measuring Instrument. 4.3 out of 5 stars. 630. 400+ bought in past month. $17.97 $ 17. 97. List: $24.99 $24.99., Noises.online uses the highest sound quality, which makes the audio files relatively big. Hopefully, the next time you play a sound, it will load almost instantly straight from your browser cache. Click the pin icon to generate an URL that embeds all the sounds you have selected. Use this URL to share sounds with your friends., Use your device microphone to capture and process audio with HTML5 tools and see the real-time sound and noise level in decibel unit (dB). The app also has a calibration …, SmarterNoise is a premium sound level meter app featuring several unique functions. SmarterNoise measures sound levels in video and audio format, records video and sound, and informs you about the risks of noise exposure. In addition, SmarterNoise includes a camera, gps-location, and easy sharing, all for free. , Mar 10, 2023 · The easiest and most accessible way to measure how loud your headphones are is by using a sound pressure level (SPL) meter. You can either use a physical decibel meter, or an application on your phone (here’s a highly-rated one for Android and a NIOSH-developed one for iOS ). Neither choice is perfect, but the physical decibel meter is more ... , , Decibel Meter, Portable SPL Meter (Sound Pressure Level Meter), Digital Noise Meter, Range 30-130dB (A) db Meter, Noise Volume Measuring Instrument, Sound Monitoring Tester (Battery Included) Yellow. 93. $1799. FREE delivery Thu, Jan 25 on $35 of items shipped by Amazon. Or fastest delivery Wed, Jan 24. , Dec 21, 2023 · 3. Take the Log10 of your answer and multiply by 10. To finish solving, all you need to do is take the base 10 logarithm of your answer, then, finally, multiply by 10. This accounts for the fact that decibels are logarithmic units with a base of 10 — in other words, an increase of 10 decibels means that the loudness of the sound has doubled. , 30-130dB environmental noise online monitoring noise meter sensor noise transmitter decibel 4-20mA detector rs485. 5 sold. Coupon & Discount. US $1.38 off On orders over US $41.55. Color: RS485. AliExpress assurance. Safe payments Payment methods used by many international shoppers., Decibel Meter Sound Level Reader 30-130dB(A), Hand-held Sound Noise Meter with Backlight Alarm, Digital Noise Meter Decibel Monitoring Tester Calibrated Audio Noise Volume Measuring Instrument 4.3 out of 5 stars 613, Decibel Meter,Digital Sound Level Meter Portable SPL Meter,35dB to 135dB Temperature Function,Noise Meter with A-Weighted [MAX/MIN Fast/Slow Data Hold], Use for Home, Noisy Neighbor, Factory. 4.3 out of 5 stars 332. $17.99 $ 17. 99. 10% coupon applied at checkout Save 10% with coupon., Does this online meter transfer data to the server? No, all audio data is being used locally. What standard does this meter use? It uses the ITU-R BS.1770-4 standard. How accurate is this meter compared to other professional SPL meters? Analyzing from the file will give you accurate results comparable to results from other professional ... , From the research I did at the time, it was the most accurate currently available. https://apps.apple.com/gb/app/splnfft-noise-meter/id355396114. When I’ve tested …, Then click Submit to view the deciBel rating. Input the intensity of a sound in Watt/m^2 and outputs the deciBel level of the sound. Get the free "DeciBel Calculator" widget for your website, blog, Wordpress, Blogger, or iGoogle. Find more Physics widgets in …, A classroom management tool to show noise level. Use your built-in microphone or plug in your USB microphone to enable this groovy noise level monitor. Adjust the microphone sensitivity to suit your microphone and classroom, …, General guidelines on how to use a sound level meter: place the sound level meter at a sufficient distance from any obstacles or reflectors. place the microphone of the sound level meter about 1,3 - 1,5 m above the ground. place the microphone of the sound level meter in the direction of the sound source. The measurements of a decibel meter ... , PCE-322A is a handheld, portable, professional class 2 sound level meter or decibel (dB) meter with built-in data-logging or data-recording functionality. Thus, PCE-322A is an ideal real-time noise measuring device as well as a noise measuring device for long-term noise exposure monitoring over time. A mini tripod is included in the delivery ..., Reading on a decibel meter. While searching our database we found 1 possible solution for the: Reading on a decibel meter crossword clue. This crossword clue was last seen on April 9 2024 LA Times Crossword puzzle. The solution we have for Reading on a decibel meter has a total of 10 letters. Answer., Nov 25, 2022 · 【Decibel Meter with A/C Weighting】 TopTes TS-501B decibel meter uses a precise condenser microphone to capture sound. It’s equipped with A-weighting and C-weighting facilities that measure noise levels from 30 to 130 dB with an accuracy of ±1.5 dB, Frequency from 30 to 8,000Hz. , A Professional dBA Noise Meter App. "Decibel X" is one of very few noise meter apps on the market that has highly reliable, pre-calibrated measurements and supports dBA, dBC. It turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful tool ..., The easiest and most accessible way to measure how loud your headphones are is by using a sound pressure level (SPL) meter. You can either use a physical decibel meter, or an application on your phone (here’s a highly-rated one for Android and a NIOSH-developed one for iOS ). Neither choice is perfect, but the …, B&K 2250 SOUND LEVEL METER/ANALYZER. B&K 2250 series delivers powerful single-channel class 1 sound level meters and hand-held analyzers. The instruments can be easily extended with the B&K quality range of microphones and measurement kits. Important update: The B&K 2250 series will be transitioned to the B&K 2245 and HBK 2255 …, Handheld, 30 to 130 dB Digital Sound Meter with Data Logger. The handheld HHSL402SD with integrated condenser microphone, it can display sound levels to a resolution of 0.1 dB, use an SD card to record/store data. View Specs. Filter By., 4) Sound Meter – Decibel. Our pick for fourth best dB meter is “Sound Meter – Decibel.” This app has an awesome user interface and several different ways to display the dB’s it is reading., Protect your hearing. This award-winning app combines the best features of professional sound level meters and noise dosimeters into a simple, easy-to-use package. - Developed by experienced acoustics engineers and hearing loss experts. - Completely FREE – No ads, no limited features, and no in-app purchases. - Tested and validated (accuracy ... , Decibel Meter is an application for measuring sound volume in decibels (dB). This application in realtime shows current value of sound volume. The main indicator shows current sound volume value and …, SmarterNoise is a premium sound level meter app featuring several unique functions. SmarterNoise measures sound levels in video and audio format, records video and sound, and informs you about the risks of noise exposure. In addition, SmarterNoise includes a camera, gps-location, and easy sharing, all for free., Who is Youlean? I’m Julijan Nikolic. (You may know me as Youlean). I am the developer behind Youlean Loudness Meter. In 2016, I created Youlean Loudness Meter as part of the KVR Developer Challenge (create the …, DECIBEL PLAYER. Play the sound of. at 50 decibels. -. PLAY. You will be asked permission to use your. microphone to take decibel readings. This online tool will let you …, Nov 2, 2023 · Then select Noise Meter. Set a noise limit using the sensitivity bar, turn on the microphone of your device, and you’re ready to go. 7. Noise ‘O’ Meter. Scratch/Noise’O’Meter via scratch.mit.edu. How it works: This is basically a coding project created using the popular coding platform Scratch. , Buy Decibel Meter, Tadeto Digital Sound Level Meter Portable SPL Meter 30dB to 130dB(5 Measurement Range) Backlight LCD Display, MAX/MIN Noise Measurement, Audible and Visual Alarms,Data Hold, A/C Mode: Sound & Noise Meters - Amazon.com FREE DELIVERY possible on eligible purchases