Niosh sound level meter app download

The weighting is user-selectable and can be accessed from the 'Settings' screen. You can select whatever metric to display on the main screen by tapping on that metric. The app contains some basic information on noise and hearing loss prevention.

In addition, the app allows the user to save and share measurement data using the smartphone communication and media features. If location services are enabled, the app can utilize the GPS feature to provide general geospatial location of the noise measurement. The app is validated and calibrated for each iOS device at our lab but we recommend that users perform proper calibration using a known noise source or by using an external microphone before and after each noise measurement.

Calibration can be accessed from the Settings screen. The app is targeted at safety and health professionals, industrial hygienists, and researchers to use as an initial noise assessment tool, but it does not replace the need for professional instruments or expertise.

The app can also be used by workers and the public in general to help make informed decisions about the potential hazards to their hearing, and promote better hearing health and better prevention efforts.

Free YouTube Downloader. IObit Uninstaller. Audio Spectrum Analyzer Pro. Leo the Cat - Fun Stickers. Decibel : dB sound level meter. You Might Also Like. Hearing Aid: Sound Enhancer. Sound Meter Noise Detector. Where Is the Noise? Keep Listening to the Beat. Have You Heard? Listen Up! Get Involved. That said, I tried using it to measure rifle gunfire with and without a suppressor and the results were too close.

Is there suggested settings for short peak impulse sounds? Thank you, Max. Measuring peak impulse sound levels, especially from gunfire, require some dedicated and specialized equipment. Gunfire can measure anywhere from dB, and the highest level we were able to capture with the app is In other words, this app — or any smartphone app for that matter — cannot capture peak sound levels accurately. A question regarding ready-calibrated external microphones — does this model measure up to the 2 tested microphones, here earlier mentioned?

In your opinion, any heads-up compared to those tested by you? Hi Martin, thanks for bringing that specific microphone to our attention. However, I would tend to think it will work as well as the mics we tested, it has excellent specifications and the manufacturer claims it is IEC class 2 compliant. Great question, Frank.

Yes, it is true that newer Apple products do come with a lightning port to 3. To make a good noise measurement, the orientation of the microphone is important and a dangling cable and microphone may present some issues to how the user handles and orients the microphone.

Some microphone manufacturer make microphones that can plug directly into the lightning port e. The microphone mentioned above by Martin, does not seem to offer a lightning port adapter that can be directly plugged into newer Apple devices. See photos 1 and 2. Love the app, but I found it only after doing an online search for sound meter apps. Your app would likely find a broader audience if the AppStore listing made it more findable.

Thank you for the kind endorsement of the app, Steve. We have received similar comments in the last several months from users having a hard time finding the app, and now with the introduction of iTunes Will the app recognize microphones plugged in directly to the Lighning port like the MicW iL mentioned above?

Please let us know if you still encounter any issues, and the model of the Sennheiser microphone you use. For example, in the older version, if I whistled directly in to the mic, dose would slowly rise 1, 2, 3, etc.

This value drops the longer the recording continues, as quieter readings are averaged in. The documentation does not seem to address this change although in the help page of the new version there is only one landing page and no further info? I know the App is set for industrial purposes but I think it suits my purpose. Our local Government sets the recommended noise level for residential areas at LAeg, adj. Could you advise? Dear Greg, so it seems that your local government is setting LAeq, the A-weighted, equivalent sound level average level measured over 1-hour period.

You can also press the LAeq and it will appear at the top for easier reading. Make sure you save the measurement s using the save button at the bottom after each 1-hour measurement so you have those records. Can the app not export a. That seems more informative to me than a report of what the max, peak, etc is.

Thank you for your suggestion, Suzi. Right now, you can save the measurement with a timestamp date and time, along with a measurement duration , and share it in. Saving data points may require additional permissions and availability of adequate storage on your device. While the app recognizes the MicW and itestmic2 when attached thru the lightening port on new iphones, have you tested whether measurements are the same as having the mics on the headphone port, assuming that the position of the mic on the cable is stable and oriented to the sound source re your earlier comment.

The MicW microphones work very well out of the box within 0. The large power transformers in electrical substations in Europe emit mainly at this frequency and harmonics. Maintenance workers are exposed to these low frequency components. Thank you very much. Hello Roberto, the MEMS microphones used in smartphones or if you use an external microphone can measure noise levels as low as 20 Hz according to their manufacturers. For low frequency measurements, you will need to choose Z-weighting from the settings instead of the default A-weighting.

Thank you, Chuck. Only a short reply. Our goal is to test the suitability of apps for a very preliminary survey of noise around transformers, that can be done directly by the workers using smartphones. If MEMS microphones are good in measuring until 20 Hz, is there some issue related with SW and with the working out of the acquired signals?

Why it is best to use a professional SLM? For a preliminary assessment, the app should be fine. You should plan to make two sets of measurements, one with the default A-weighting and one with the Z-weighting selected. You can then compare the two measurements to understand the low-frequency noise contribution from the transformers. The Z-weighted noise levels will higher, depending on how much of the noise is low-frequency. A measurement with a professional SLM is suggested if you are trying to conduct a full assessment and isolate the noise emitted from the transformers, especially if you plan to implement some engineering controls to mitigate any harmful exposures to the workers.

Thank you for the valuable feedback, Husein. We are gradually trying to increase our exposure on the AppStore. We had a similar suggestion few months ago and we made some changes in the naming and keywords used, and added an option to allow the users to rate the app and that appears to have helped a bit. However, if you, or any of our valuable readers, have other suggestions for making the app more findable, we would certainly appreciate it.

I measured my guitar amplifier with an iPhone 4S internal microphone at 72db. However, the ear that is closest to the amplifier feels muffled. We do recommend hearing protection for sound levels above 85 dBA. Questions I would ask, how far was your iPhone from the amplifier speaker, was it pointed bottom side where the microphone is at the speaker, I would also try to take an average, you can do that by selecting LAeq and let it run for seconds.

It could be that the measurement is too low. Having said all that, muffling in the ear is a symptom that often needs medical attention, especially if it happens repeatedly after you play your guitar. We do recommend that you follow up with a health professional, your physician or an audiologist. I downloaded the Sound Level meter app on an iphone 5s and and an iphone 8. The microphones do work in other apps. Is there a correction for this?

Hello; Could you please comment on or recommend without endorsing an appropriately priced Type 2 field calibrator for routine calibration of the microphone. Even with a reliable instrument and microphone, the user may benefit from knowing accepted techniques for measuring sound level with precision and accuracy.

Those types of professional instrument calibrators are priced in the several hundred to over a thousand price range. There are cheaper options on the market but we cannot vouch for their accuracy or reliability, though they should be adequate for general purpose, Type 2 level of accuracy, noise measurements.

One important factor in the calibration process is to ensure that you obtain a calibrator with the right adaptor. This is great app, thank you for developing this. It is an excellent tool for informal sound surveys in the workplace. How far do you think you are from an app that can be used for compliance purposes provided you use the appropriately sensitive external microphones and calibration devices?

Size 18 MB. Category Utilities. Compatibility iPhone Requires iOS Mac Requires macOS Languages English, Spanish. Price Free. Family Sharing With Family Sharing set up, up to six family members can use this app. More By This Developer.