High-Frequency Noise Monitor

High-Frequency Noise Monitor

by TOON,LLC

4 ratings
2 reviews
$6.99

Details

  • Released
  • Updated
  • October 7, 2021
  • March 10, 2026
High-Frequency Noise Monitor video #1 for iPhone
High-Frequency Noise Monitor screenshot #2 for iPhone
High-Frequency Noise Monitor screenshot #3 for iPhone
High-Frequency Noise Monitor screenshot #4 for iPhone
High-Frequency Noise Monitor screenshot #5 for iPhone
High-Frequency Noise Monitor screenshot #6 for iPhone
High-Frequency Noise Monitor screenshot #7 for iPhone
High-Frequency Noise Monitor screenshot #8 for iPhone
High-Frequency Noise Monitor screenshot #9 for iPhone
🖼️Get Icon
Icons↘︎

About

This tool monitors and analyzes high-frequency noises above 8 kHz that are often inaudible to humans. It visualizes these sounds using spectrograms and allows for detailed frequency analysis to understand their occurrence and potential impact.

Real-time frequency analysis
Spectrogram analysis (FFT/Octave)
Maximum frequency and power level detection
Time trace display
Playback with high-pass filter
Save analysis results as images
Show original description

What's New in High

6.0

March 10, 2026

- Improved internal processing and performance. - Requires iOS 26.2 or later.

User reviews

No customers…

Every time you update this app, you throw away 1000’s of potential customers. Not all people will update their phones to the latest iOS. I don’t, and I won’t be updating again. Ever. Many can’t update, but don’t need a new phone, or can’t afford to.

The app looks no different, so only supporting the latest iOS is not necessary, surely??

Anyway… it’s a good app. It works well, and I like it. But I suppose this is the last update I will receive. Not a big problem I think. Thank you.
Show more

Difficult to use

Instructions very brief making the app useless to the average individual trying to verify if there is a a source of high frequency noise. (Ruling out tinnitus vs high frequency noise in the home).

Response from developer

This app is designed to monitor the frequency components of high-frequency sounds in real time. For simply detecting high-frequency noises, we recommend our “Mosquitone Detector” app. It can detect and visualize high-frequency noises. Additionally, it features a search mode that can display the direction of the high-frequency sound source that detected the highest sound level on the radar display (pie chart).

Developer apps

FAQ

What is High-Frequency Noise Monitor?

High-Frequency Noise Monitor is a utility app designed to detect and analyze sounds with frequencies above 8 kHz, which are typically inaudible to humans. It provides real-time analysis and detailed spectrograms to visualize these noises.

How does High-Frequency Noise Monitor work?

The app uses the iPhone's microphone to capture sound, then performs real-time frequency analysis. It can also save PCM data to generate FFT and octave band spectrograms for detailed examination of noise occurrences.

What devices does High-Frequency Noise Monitor support?

High-Frequency Noise Monitor is currently supported on iPhone devices.

What is the price of High-Frequency Noise Monitor?

High-Frequency Noise Monitor is available for a one-time purchase of $5.99.

How often is High-Frequency Noise Monitor updated?

The app was last updated on March 10, 2026, indicating a recent update. The latest version is 6.0.

What is the age rating for High-Frequency Noise Monitor?

High-Frequency Noise Monitor has an age rating of 4+, making it suitable for a wide range of users.

Does High-Frequency Noise Monitor have ads?

No, High-Frequency Noise Monitor does not contain advertisements. It is a paid application.

What is the user sentiment for High-Frequency Noise Monitor?

Based on available data, High-Frequency Noise Monitor has a rating of 3.3 stars from 4 ratings. This suggests a mixed to positive user reception.