Where Is the Noise? Keep Listening to the Beat. Have You Heard? Listen Up! Get Involved. Breadcrumb Home Have You Heard? Last Updated Date. Size Compatibility iPhone Requires iOS Mac Requires macOS Price Free. App Support Privacy Policy. Family Sharing With Family Sharing set up, up to six family members can use this app. More By This Developer. Audio Spectrum Analyzer Pro.
No problems whatsoever. I love the way it goes immediately to the SLM mode. Is there a way to attach a picture to the email? Thank you for the input, David. You can share the noise report, in pdf format, via email. If you like to attach a picture of the screen, then I would take a screenshot using the home and ON button and then in the email screen that has the pdf report, I would add the picture as an attachment.
I found a little bit more difference in closed areas than in open areas. Nice app!! Great idea and achievement. However, the fact that it is only for iPhones limits its use. Also, it sounds like recommending the iPhone. I know that this is not your intention at all, but still. Please review your decision to exclude the Androids! Thank you kindly Alberto, and great to hear from you! In addition, some Android makers use their own audio processing, some use third party, which can introduce latency in some devices.
On the other hand, Apple devices have a common software architecture called Core Audio that makes dealing with audio signals uniform across all its devices. In our studies see the blog references above , we would find the same app provide different readings on different devices and this could also explain why the sound measurement apps market on Androids is much less developed as far as features and performance than you can find on iOS. We are exploring several options at the moment since we recognize the importance of the Android market.
If you, or any of our blog readers, have any suggestions or ideas for dealing with this issue, we definitely welcome them. First I want to thank Captain Kardous and his colleagues for the studies and hard work that lead to the development of this app.
Microphones and other electronic components used in the iDevice is what can change. However, Apple is doing a good job at choosing good quality parts and variations between iDevices for the kind of measurement we are looking for peak values of PCM data can be corrected with proper calibration. Apple has much less SKUs than the entire Android market, making it easier to find the variations in the lab and correct them. Also, Android devices are subject to more latency in the audio signal processing.
As for the hardware part of the issue, there are more than ten popular Android phone brands on the market, all using various components.
All things considered, it is indeed an impossible task to test and verify the performance of the app on every Android device on the market to find a proper calibration. All of our products are in the public domain and available for use free of charge. Please feel free to reprint the blog post. We just ask that you provide the correct attribution. I have asperger and workshop in an Office environment. I would like to use this tool to measure the total sound dosis received every day.
For concentrated work the advised level is about 45db or less. That is a much lower than the level for hearing damage. Is it possible to add these lower levels to the app so we can use it also for office sound level dose? Is there a way that I calculate the dose myself for this lower level based on 80 db?
Would be handy if the data could be exchanged in binary format with some kind of service for reporting on a larger scale. Think about the best office to work for contest. Thanks for your comment, Tauvic.
The app was designed to measure noise exposure in the workplace and is aimed at industrial hygienists or occupational safety and health specialists. The 45 dB is a non-occupational limit for office environments and indoor spaces and thus it is beyond the scope of our mandate at NIOSH. There are instruments out there that allow you to set the threshold at 40 dB or no threshold at all , there is no way to calculate the dose otherwise, unless you find a way to record the actual sound waveform in your office and do the calculations based on that recording of the raw signal.
Thank you for the suggestion for using binary data, this is something that we might consider in future updates. Please see the January 24th response to Marc. An update is now available for the app which addresses this issue. I found a bug at the report.
After configuring the threshold limiter to 80dB. Thank you. I have noticed that if I use my Iphone 6 without using an external microphone, I get noise levels which are much lower than the actual sound levels. If I use my ipad ai without using an external microphone, I get much better results and higher noise levels.
I have noticed this as well. I also get higher readings with my iPad to a degree of about 10 decibels. Which one should I use? However, the message is still there! What should I do to make this work? In the meantime, please try to turn off your iPhone and let it reboot and it should have resolved it. Some kinds of noise exposure happen infrequently or unpredictably.
For example, neighborhoods near me have started experiencing increased noise from overflights connected with a large airport within five miles, as air traffic routings and protocols are modified to exploit the potential of GPS. Noisy overflights happen unpredictably, so it would be useful to have the measuring device in standby mode, tracking noise levels, and springing into more intensive action when a threshold is exceeded.
Beyond measuring the levels for a single weighting, it would be more useful if enough information could be retained so the levels could be calculated and displayed under multiple weighting schemes and different metrics, e.
It would also be good to save recordings of noise incidents, perhaps including some seconds before and after the actual threshold-exceeding period.
The overflight example is only one scenario. Others that have come up in my neighborhood have been late-night street racing, construction noise, loud custom mufflers and freeway noise. A smartphone-based application for extended monitoring would be extremely helpful in all these instances and surely many others. Our aim is to help the occupational safety and health specialist make an easy and quick noise measurement in the workplace — the app measures and calculates the relevant occupational noise exposure metrics and reports noise levels and averages in A, C, or Z weighed decibels.
I believe there are some studies that have used smartphones as dedicated sound measurement tools. Some researchers have explored the use of older, refurbished smartphones with a dedicated app, to build a cheap noise monitoring network, mostly in urban settings. I believe limitations regarding battery life, proper calibration, and reliability continue to hinder their wide adoption for more than conducting research studies though. I just tried to download the App. However it is not available from the iTunes nor from the App Store.
Any reason? Or you can click on the direct link above. Thank you Capt Chuck and Metod for this great app! Is there a way to display the frequency spectrum of measured noise in this app? If not, can it be added in future versions? Thank you for the kind comment, Dr.
Endless possibilities makes me even more curious. Wonderful insights here at you blog. Very informative post. Nice collaboration, keep it up. I compared it using the SoundLog app on an iPhone 5S and the standard internal microphone. Sound levels were provided by a Hz tone produced by a loudspeaker. The SoundLog is an excellent app from the National Acoustic Laboratories, an Australian government research institution that conducts research on noise and hearing loss, similar to the NIOSH hearing loss prevention program.
I will have another go at my comparisons. We are exploring several ideas regarding Androids. See my response above to Alberto Behar on February 6th as to the reasons why the app is not available on Android devices. When I use my iphone with no external mike I get a lower reading then when I use in the same way my iPad Pro around in average 10 decibels How can this be explained? My iPhone is a SE. We have tried to see if we can get different readings on our iPads and iPhones in our lab to measure various noises, but have not seen similar results.
Are you running the same OS on both devices? Also, the iPads have a back-facing noise-cancelling microphone, in addition to the front-facing one that may be causing some issues for some users. Try to go into Settings, General, Accessibility and see if the Noise Cancellation is enabled or disabled on both devices?
This product was developed under a Memorandum of Understanding with an outside partner so the code is not in the public domain. Thanks for sharing this post. It detects sound with the help of any external microphone connected to your pc. The app underwent extensive laboratory testing in order to meet the approved criteria for sound measurement, within 2db of a type 1 sound meter. Decibel meter measures ambient volume in decibels, which is the most common unit of sound measurement. You can experience tidy graphic design with high frame by this smart sound meter app.
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