High frequency sound generator. Ultrasonic sounds.
Ultrasonic Emitter is a free Android tool that generates high-frequency tones beyond typical human hearing for hearing checks and training. It has 100,000+ total downloads and 16K in the last 30 days, reflecting steady interest in the TOOLS category. The app holds a 3.40 rating from 727 reviews.
Pros & Cons
Specializes in ultrasonic tone generation useful for hearing tests and animal training
User-controllable intensity to identify hearing thresholds
Clear safety guidance and non-weapon usage policy
Free, lightweight tool suitable for quick tests and training
Lacks dog-specific tones or calibration features highlighted in competitors
Not ranked in top lists, which may affect discoverability
Not a professional audiometry replacement or a robust testing tool
About Ultrasonic Emitter
Ultrasonic Emitter is a tools app developed by MemiSoft App Studio.
Download Statistics
Ultrasonic Emitter has been downloaded 420 thousand times. In the last 30 days, the app was downloaded 16 thousand times.
User Ratings
Ultrasonic Emitter is rated 3.42 out of 5 stars. The rating is based on 840 ratings.
App Information
Ultrasonic Emitter is FREE to download. The APK download size is 3.69 MB. The latest version available is 1.0.22. The last update was on January 5, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play August 2023.
Description
The highest frequency that the human ear is capable of perceiving is 20 KHz, although this frequency decreases with age.
The speakers of mobile devices do not usually emit sound above 20 KHz, so this app is limited to 20 KHz.
Most adults cannot hear above 15 KHz.
Do not use with headphones. In case of discomfort, dizziness and other symptoms stop use immediately!
Do not use this application as a weapon against dangerous animals.
The application is used at your own risk. The developer bears no responsibility for the use of this application.
Some uses of high frequency sounds:
- Hearing tests. This tool can be used to perform hearing tests, although accuracy may vary depending on the device used.
The app can generate high-frequency tones in a specific range, usually above a person's normal hearing range. These tones are of different frequencies to evaluate different parts of the hearing spectrum.
To assess hearing threshold, users can adjust the intensity of the sound emitted by the app until they no longer hear the tone. This point, known as the hearing threshold, can indicate the minimum detectable frequency for the individual.
It is important to note that a hearing test app based on high-frequency sounds cannot completely replace a professional hearing evaluation by a hearing health specialist. However, it can serve as an initial tool for self-assessment and hearing monitoring, providing preliminary information about hearing health.
- Pet training. Applications designed for training dogs and cats can emit high-frequency sounds that are striking or uncomfortable for animals, which can be used to teach them certain behaviors or to correct unwanted habits.
High frequency sounds can be used as positive or negative reinforcement during the training process. For example, a pleasant sound could be associated with a desired action to positively reinforce the behavior, while an unpleasant sound could be used as negative reinforcement to deter unwanted behaviors.
High-frequency sounds can be used to teach basic obedience commands, such as sit, stay, or respond to the owner's call. The association between the sound and the desired action can speed up the learning process.
This application can be used similar to a high frequency whistle. If you notice a sign that the dog or cat being trained feels a strong repulsion towards the high-frequency sound, you should stop using it immediately.
The concept of using animal nuisance frequencies as a repellent method has been the subject of research and debate.
It has been suggested that some animals, such as rats, mice and other rodents, as well as mosquitoes and other insects, may be sensitive to certain sound frequencies that are outside the human auditory range, and that these sounds may serve as a repellent to such animals.
Despite the popularity of the idea, it is unproven. The effectiveness of high frequency sounds as repellents is not supported by scientific research. This app is not an effective solution as an anti-rat or anti-mouse tool and is not effective as an ultrasonic barrier for these purposes. The purpose of this app is not to scare away animal pests.
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The Best! I had an annoying mouse in my house that drove me crazy. I put out traps; which were avoided, I made noises and threw things in the direction of where I heard the rustling of the mouse... nothing worked. I searched for apps that would drive away mice, and I ran across this one. I installed it and set it to the highest frequency. Within minutes, the rustling stopped, and the mouse was gone! I don't know if it left my house entirely, but it did leave the room that I was in!
★★★★☆Aedin Bradshaw· Oct 2, 2023
So far I believe it works. A mouse had gotten into my bedroom and I couldn't sleep for the noise of it on the wooden floor and couldn't get it out of the room. Eventually I found this app to download, I ran it on the Auto option and it either shut the pest up or it left the room. Either way I got back to sleep.
★☆☆☆☆Ian W· Dec 12, 2023
After installing and opening for the first time, a notice pops up asking for a small contribution (£2.09) to use without advertising. The amount is fine, until you discover it's not for using all the features in the app. £2.09 allows you only one frequency! The app has very limited use with only one frequency. No mention of this was made prior to payment and one would naturally assume payment would cover all the app's features. This is not at all fair play! Uninstalled. £2.09 lost.
★☆☆☆☆VixxieLynne Miramontes· May 3, 2026
Saw absolutely no indication of any way to change the volume turn it up or down. Promptly uninstalled. When I use the up-down buttons on the side of my phone they did absolutely nothing.
★★☆☆☆Jason Fong· Oct 16, 2023
Its semi works. The problem is for most mouse and rats they hz frequency that works best for them is at the 30k to 55k hz. So for strange reasons that it worked for you is probably just very temporary. It probably just annoyed them for a bit and will come back soon...
★☆☆☆☆Andreas Ioannou (Shelidoni)· Oct 8, 2023
1. Make dog whistle app 2. Spam as much humanly possible ads to make money on 70kb app 3. Get deleted and get 1 star
★☆☆☆☆Eldar Malyshov· Feb 10, 2026
15kHz max. Ultrasonic starts from 20kHz. So the app name is a lie.
Google Play Rankings for Ultrasonic Emitter
This app is not ranked
Technologies used by Ultrasonic Emitter
12 permissions
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Trust & Safety: The app requests a range of permissions including advertising ID, network access, internet, wake lock, foreground service, and billing-related services. It provides safety warnings (avoid headphone use, discontinue if uncomfortable) and clearly states it is not a weapon and that usage is at the user’s own risk, with no responsibility assumed by the developer for usage.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
