SmarterNoise Pro

Agibili

About this app

SmarterNoise Pro is the most advanced edition of the SmarterNoise recording sound level meters. Our Pro edition decibel meter is developed especially with more advanced measurements in mind, and includes many requested features such as a frequency spectrum display, export of measurement data, A-, C- or no weighting, and full screen audio measurement. Our Pro edition does not contain any advertising, and performs accurately and fast.


Features of SmarterNoise Pro - sound meter analyzer recorder:

• Sound level measurement in video mode
• Sound level measurement in audio mode
• Sound meter snapshot camera
• Record video and audio files
• Sound level activated audio recording
• Limit recording length
• Frequency spectrum display
• Peak frequency detection
• A-, C- or no weighting
• Export of measurement data in CSV format
• Full HD (1080p), HD (720p) or VGA (480p) video resolution
• Three video quality settings
• Archive for saved files
• Sharing of saved files
• Add text notes to measurements
• Calibration
• Location, address
• Time and date
• Continuous Leq, LAeq, LCeq value
• 10 second sound level average (Leq, LAeq, LCeq)
• 60 second sound level average (Leq, LAeq, LCeq)
• Maximum and minimum decibel level


About decibels and sound level measurement

The unit for measuring sound is called a decibel. Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of about 3 decibels. The reference point of 0 decibel is set at the intensity of the least perceptible sound, the threshold of hearing. On such a scale a 10-decibel sound is 10 times the intensity of the reference sound. Highlighting this is important as already a few decibels higher or lower makes a noticeable difference in how noise is perceived.

The preferred method to describe sound levels that vary over time, resulting in a single decibel value measuring the total sound energy over the period, is called Leq. It is however common practice to measure sound levels using A-weighting, which attenuates lower and higher frequencies that the average person cannot hear. In this case the value is called LAeq.

A- and C-weighting

The A-weighting is a standard, commonly used filter that attempts to alter the measured sound pressure levels to more closely match the perception of the human ear. A-weighting makes the sound level meter less sensitive to very high (over 8000 Hz) and low frequencies (below 1000 Hz).
C-weighting also attenuates low and high frequencies, but the attenuation of low frequencies is much less severe compared to A-weighting.

Calibrate:

Calibrate the application using the calibration tool found in the settings menu. Phones and their components vary in quality and setup so you need to calibrate the app in order for the results to be relatively comparable. One suggestion is that you close the window and door to your bedroom or bathroom, turn off appliances, and once its very quiet calibrate the app so the reading is about 30 decibel.

Ratings and reviews

I had Plus and upgraded to Pro. Immediately after install on Android phone the decibel graph overlays were shown in video mode (and presumably in recordings). But decibel graphs then became inaccessible and not shown despite the settings for that being available in Video Settings. Only frequency graph overlays on video display. I've completely reinstalled twice and no luck. How do I restore

GPS glitch constantly giving incorrect address with fully unrestricted settings across all GPS settings. Fix: clear app cache, open Google maps and tap home icon to lock in/reset location, leave gmaps open. open SNP and location should be correct (works for me). obviously an issue though, hope this gets fixed.

I am finding this app very useful to document environmental noise levels. I am using it to document a noise complaint. It is very well designed. I audio mode, it records the sound, a decibel graph, and a spectrogram. In video mode, which uses more bytes, it also records a video to document the recording site.

What’s new

Improved the dynamic range of the frequency spectrum displays.