UltraSound Detector

912 reviews
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About this app

UltraSound Detector is the App that allows you to detect ultrasound (ultrasonic) acoustic signals above the user-defined frequency (above 18 KHz by default).
This detector can be useful in following cases:

  • To check out the work-ability of various numbers of Ultrasonic electronic pest and insect repellent devices as well as any ultrasound emission devices if they work in the appropriate frequency range.

  • To locate the leak detection in air condition and refrigeration systems. You are probably familiar with the hissing sound a large leak makes. Smaller leaks also emit sound, however the frequency is too high for our ears to detect it. An ultrasonic leak detector lets the ultrasonic hissing sound be detected. Some leaks can be detected from several feet away, therefore access to the leak is not always necessary.

  • To detect the presence of Ultrasonic Cross-Device Tracking technology in some public places. The technology embeds high-frequency tones that are inaudible to humans in advertisements, web pages, and even physical locations like retail stores. These "ultrasonic beacons" emit their audio sequences with speakers, and almost any device microphone—like those accessed by an app on a smartphone or tablet—can detect the signal and start to put together a picture of what ads you've seen, what sites you've perused, and even where you've been.

  • To find out the voice to skull devices (V2K technology). This device is a weapon use for transmitting voices with low or high frequencies. Voices can be for commands or harassment attacks that may look like the target individual's own voice. Voice to skull technology is sometimes referred to as “synthetic telepathy.”

  • To detect some kind of ultrasonic weapons, that cause physical pain without human detection.

  • To check out the quality of tremble sounds (high frequency) of your loudspeakers.

Result of detection can be shown on the screen in the foreground mode and also be presented in the notification form and (or) by sound (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).


  • Completely NO ads.

  • The signal level indication.

  • Vibration indication of the alarm event.

  • Event log is recorded automatically. Signal spectrum and location information can be included.

  • The converter ultrasonic signals into audible sounds. So you can hear ultrasonic signals.

  • 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.

  • Adjustable frequency range and selectable frequency resolution between 2.5 and 50 Hz.

If you have any problems or any suggestions to improve this application, please feel free to contact
by e-mail: info.sergiosoft@gmail.com
Updated on
May 6, 2018

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

871 reviews
A Google user
April 22, 2019
Very impressive app. I downloaded it for leak detection. Unfortunately under the last tab - Transfer / Ultrasonic to Audible Sound - although the on/off switch is working, it don't keep the ON state after coming back to other tab, i.e. Signal. Phone LG V20. I cannot use the app for the leak detection, being interested in using a headset for hearing heterodyned ultrasonic spectrum into the audible one. Am I doing something wrong... I have some suggestions for a professional and paid app form.
86 people found this review helpful
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A Google user
June 15, 2019
The app has a lot of grammatical errors in it. I'd suggest fixing that so that it doesn't make the app look less credible. People are less likely to trust the legitimacy of an app if there are numerous spelling and grammar errors present in its menus. If English isn't your first language, might I suggest collaborating with a native speaker to proof read all of your text for the description pages of your apps as well as any texts within the apps? Otherwise, the app itself is good.
109 people found this review helpful
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A Google user
April 24, 2020
Skeptical at first... Until I tested it with a sig. gen. It works! I've only been able to send u.sound frequencies up to 20kHz but this astonishing app detected them to an accuracy of 0.2kHz. Now my sig. gen. was only 20cm away from my phone so I'll have to test it at greater distances. Very impressed indeed!
62 people found this review helpful
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