UltraSound Detector - Slunečnice.cz

 UltraSound Detector 1.33

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Introduction.
UltraSound Detector is the App that allows you to detect ultrasound (ultrasonic) acoustic signals above the user-defined frequency (above 18 KHz by default).

Result of detection can be shown on the screen in the foreground mode and also be presented in the notification form and (or) by vibration in the background mode when the screen of the Android device is turned off. The upper working frequency is depend on the audio specification of the current Android device and can be reached up to 150 KHz if the external ultrasound microphone or sensor is used. Nevertheless, the internal microphone also can be used to determine the ultrasound signal but sensitivity and the upper frequency will be worse depending on the quality of the internal microphone.
Moreover, the App is using an oversampling feature. So, you can see for example 25 KHz ultrasound even if your device digitizes only 22 KHz audio (44 KHz sample rate).

Features.

Completely NO ads.


The app records an event log and writes the location where ultrasound was detected.


The signal level indication..


Vibration indication of the alarm event.


Background mode with notifications. Once this option starts, the App runs quietly in the background and requires no human interaction until the alarm event happens. It continues to run even after the device reboots.


Adjustable battery consumption in the background mode. The App is designed to conserve your device battery and allows to select the data update rate. The more update rate time, the less battery it takes.


Comprehensive spectrum analysis with different ways to display results: spectrum, waterfall, oscilloscope.


Selectable frequency resolution between 2.5 and 50 Hz.


Comprehensive spectrum analysis with different ways to display results: spectrum, waterfall, oscilloscope.


Frequently asked questions:


Q: How does it work if your smartphone is designed to hear only audible sounds i.e. between 20 Hz and 20 KHz?
A: The idea of the App is based on the fact that any analog system (microphone and amplifier of your Android device in this case) does NOT have ideal characteristics and ultrasound signals infiltrate through it at least up to 30 KHz.


Q: Why is there no reaction when I placed it right in front of an ultrasound source?
A: Do not try to detect hundreds KHz and any MHz ultrasound sources. The app works up to 30 KHz using an internal microphone and up to 150 KHz using external special microphones. The signal also can be significantly weakened depending on the particular hardware of the Android device.



If you have any problems or any suggestions to improve this application, please feel free to contact


by e-mail: info.sergiosoft@gmail.com


Thanks!


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