Sound Spectrum Analysis

Audio Frequency Analyzer (RTA)

Published by: Dmitriy Kharutskiy
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Revenue

Description

The application is designed for analysis of a sound spectrum in real time (with a microphone). Besides, the application can be used as a measuring instrument of noise level (not for exact measurements).
• Sound wave.
• Fast fourier transform (FFT). FFT size: 2048 (the accuracy of determining the frequency of ±12 Hz), 4096 (±6 Hz), 8192 (±3 Hz), 16384 (±2 Hz), 32768 (±1 Hz), 65536 (±0.5 Hz), 131072 (±0.2 Hz).
• Linear and logarithmic frequency scale.
• Linear frequency scale with maximum details (there is a choice for the displayed frequency range).
• Linear and logarithmic amplitude scale.
• Octave bands (1/1, 1/3, 1/6, 1/12).
• Window functions (Blackman, Hamming, Hann (Hanning), Blackman–Nuttall, Gaussian, Flat top).
• A- and C-Weightings.
• Peak hold.
• Exponential spectrum averaging.
• Peak frequency detection.
• Values of any point (for frequency scale and sound wave (at maximum detail)).
• Sound level meter (dB SPL). You can calibrate your microphone by launching a signal generator with a sinusoid frequency of 1000 Hz on another device and making the volume very low. When the sound is almost inaudible, it is necessary to find the amplitude for the frequency of 1000 Hz on the spectrum (FFT size: 16384). This value should be multiplied by 1.2 (to compensate for spectral leakage). It will be the reference value for your microphone. ESTIMATE THE TOTAL NOISE LEVEL BY USING THE SOUND WAVE MODE AT THE MAXIMUM VALUE.
• Sample rate: 48000 Hz.
• Taking a screenshot by lightly touching the screen.
• Export data to a WAV or text file ("Y=[y1 y2... yn]", "y1;y2;... yn", "x1;y1\nx2;y2;..."). Number of points is adjusted via "FFT size".
• Automatic stop in the sound wave mode (when increasing or decreasing signal strength).
• Automatic stop in the spectrum mode. Now you can stop data collection when the start of the fading signal reaches the end of the FFT buffer. The beginning of the signal is not calculated accurately (just like with an automatic stop in the sound wave mode).
• Test wave.
• Saving the measurement results in the application. Files with saved data (SavedData_[date]_[time].txt) can be copied to a desktop/laptop computer or transferred to another iPhone using iTunes. There are buttons for quick loading and comparing saved files.
• Dark theme.
• List of frequency peaks. If several peaks have a common base, then they are considered as one peak. The minimum height of the peak for octave bands is 2 dB.
• Interpolation of frequencies in the list of peaks. To interpolate the frequency of the peak, select the Gaussian window (the accuracy of determining the frequency can increase by 10-100 times). The calculation is not done for the extreme bins or if the adjacent bin is zero.
• Calculation of the amplitude (in the list of peaks) using neighboring bins (to compensate for spectral leakage and use of the window). The number of bins used for calculation is written in brackets.
• Collecting recent data (last minute). You can move over all collected data. The amplitude of the waveform can be changed in the sound wave mode.
• Calibration file. The app recognizes only files for the UMIK-1 microphone, but you can specify which microphones you need support for.
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Sound Spectrum Analysis FAQ

  • Is Sound Spectrum Analysis free?

    Yes, Sound Spectrum Analysis is completely free and it doesn't have any in-app purchases or subscriptions.

  • Is Sound Spectrum Analysis legit?

    🤔 The Sound Spectrum Analysis app's quality is mixed. Some users are satisfied, while others report issues. Consider reading individual reviews for more context.

    Thanks for the vote

  • How much does Sound Spectrum Analysis cost?

    Sound Spectrum Analysis is free.

  • What is Sound Spectrum Analysis revenue?

    To get estimated revenue of Sound Spectrum Analysis app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.

User Rating
App is not rated in Iceland yet.
Ratings History

Sound Spectrum Analysis Reviews

Best audio spectrum analyzer on iOS

Richie Tr on

United States

I had a similar app on android and was sad to find the iOS versions lacking until I found this one. This was an easy purchase and the free version actually does quite a lot. I mostly just bought it to show appreciation. Other apps have subscription based models which is ridiculous to me. The interface for this is really clean and it’s just what I want when I’m curious about the frequency of sounds around me.

Very well thought out UI

RPM3525 on

United States

This is a very well set up app. There is a good amount of built in help, with some online help available. Price (one time) is good. App functions well with a lot of customization/adjustments available. Well done guys!!

Not free. Not for iPad

Consumer8766 on

United States

Annoying paywall to change any setting. And this is formatted for a small screen.

All functions are hidden behind a pay wall

Deepblueelo on

United States

Basic screen is dark and had to read. Functions can't be tested without paying, so I deleted the app.

Pretty good

jon in alabama on

United States

My only problem is that I cannot easily select the frequency range I want to look at. The pinch adjustment only works to look at higher frequencies, whereas I want the window to be able to be set not just to exclude low frequencies. Perhaps the ability to set the range manually… type in lower limit, type in upper limit. I have not yet tried with various calibration files yet, but when I get an external microphone I will do this and see how well it works. I basically need this app to measure sound sweeps and pink noise from various devices to check flatness of frequency response, and it seem to do ok at this. Price is right, and it has many options that will make most casual users happy.

Great for speaker design

Shadow12405 on

United States

I’m a novice speaker builder. I had designed some speakers, used WINISD and Vituix CAD to design the box and crossovers and had the speakers hooked up. I had tried to used Room EQ Wizard, but to no luck. I had problems with a calibrated Mic, getting the software to work right etc. So, I needed some tool to measure the speakers and found this. This tool allows the IMM-6 mic and gives me enough to measure the speakers. The support is fantastic, timely and thorough. I can get the data out, screen grab the graph etc. The price is fantastic, and for those that had problems with the tool not giving them enough for free, it’s only a couple bucks. And for what the designer provides, that’s more than fair. For anyone building their first speakers (maybe even more advanced) this is a great tool.

Very nice app, but there is a one time payment of $3

Aorin72 on

United States

Most of the negative reviews seems to come from the fact that the majority of features are locked behind $3. It would be nice to have that stated in the description, but if you can look past that, it’s a really nice app. The UI can also be a bit difficult to learn, but the app is really accurate from my testing and does everything it promises to do.

Ruined by What it Said about the app

RET System on

United States

I was surprised that it showed pictures that it has a lot of functions but nothing's real. what a shame

Completely junk!

HoS2019 on

United States

What a hack. BIG mouthful of promises what this app all could do. But this is just ahoax. In reality, at least until you may consider spending $$$$, you get nothing. No frequency analysis, 90% of the functions are not present and constantly you get bugged for money. Don’t waste your time, with is Fraud.

Almost perfect for my needs, but need small improvement👋

Julian Kunappe (JK) on

United States

Hi, I was quite happy with this app. But some crucial request should be asked for my application. I am using a high quality microphone sampling rate is up to 192 kHz. I was quite happy this app showed the spectrum range up to 90KHz, but the actual measurements was roughly quadrupled, maybe because it only assumed 22kHz as maximum frequency. I need an update to match with the actual spectrum. Thanks in advance

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