toon|WVS Support - toon,llc.

Description

Wavelet Voice Sonogram

"Wavelet Voice Sonogram" is a new sound spectrogram app that performs time-frequency analysis of acoustic signals.

A spectrogram is a graph that shows the results of a sound frequency spectrum analysis with time on the horizontal axis, frequency on the vertical axis, and signal strength in colors.

This app can perform acoustic analysis and display the spectrograms by using three time-frequency analysis methods, Wavelet analysis, Octave Band analysis, and FFT analysis.

It can record sounds from iPhone built-in microphone. While playing the sound, you can search for the desired sound and analyze it.

This app allows you to easily perform acoustic analysis of speech, instrumental sounds, noise, and more. It can also be used to learn elementary speech analysis.

The latest version supports iOS 17 and improves stability and performance.

Please click on the link below to access "Wavelet Voice Sonogram" product page in AppStore^TM.

Communications charges when connecting to AppStore will be borne by the customer.
iPhone is a trademark of Apple Inc., registered in the U.S. and other countries. AppStore is a service mark of Apple Inc.

Products Information

Version: 4.0
Release date: October 26, 2023
Size: 0.5 MB
Category: Utility, Education
Compatibility: Compatible with iPhone. Requires iOS 16.6 or later.
Status: Now distributing.

Features

"Wavelet Voice Sonogram" has the following features:

Acoustic analysis can be performed using PCM data recorded with the iPhone's built-in microphone. It is possible to analyze 5 seconds of sound data backward from a user-specified point in time.
Three types of acoustic analysis, FFT analysis, octave band analysis and wavelet analysis, can be performed simultaneously.
PCM sound recording and playback is possible up to about 180 seconds, and the audio waveform graph and FFT analysis graph are displayed. While playing back sound, you can search for sound at any point in time.
You can zoom in on a specific 10 seconds of PCM data and play back the sound. It can be used to find the sound at the point you want to analyze.
The spectrogram analysis result and time axis waveform can be contrasted and played back.

Specification

Sampling frequency: 48 kHz
PCM recording time: approx. 180 seconds max.
Sound zoom function (10-Sec): Zooms in on any 10 seconds of PCM data and plays back the sound.
Acoustic Analysis: About 5 seconds (Analysis points can be specified using the Time position slider.)
Sound recording and playback, sound waveform and FFT graph display (Main): PCM graph, 10sec zoom graph, FFT graph.
Time position slider: Points to the cursor position on PCM graph.
Spectrogram display (FFT / OCT / DWT): 5 sec PCM graph and spectrogram analysis graph (vertical axis - time [0 - 5.0 sec], horizontal axis - frequency [100Hz - 8kHz])
Snapshot (Snap): Save the analysis image in "Photos".

Applications


Visualization analysis of the sound source, such as voice, conversation, animal sounds and instrument sounds.
Analysis of the sound configuration, such as music performance.
Learning elementary sound analysis
Various acoustic testing and others.

Spectrogram

The spectrogram is a graphical image with two geometric dimensions that the horizontal axis represents time and the vertical axis is frequency, and the addtional third dimension is indicating the amplitude of a particular frequency at a particular time that is represented by colour of each point in the image.

Measurement display X-axis - time(sec)
Measurement display Y-axis - frequency(Hz)
Measurement display color image - signal's amplitude

Important initial settings (iOS permissions)

In order for this app to work properly, it is necessary to make the following initial settings related to the iOS system.

Microphone access permission setting
Photos access permission setting

Basic Operations

This app analyzes the frequency of the recorded audio signal using the built-in microphone and displays its characteristics in three types of spectrograms, Wavelet analysis, Octave band analysis and FFT analysis.

The app uses the MAIN view to perform the major operations such as recording & playback, analysis execution and displays the analysis results in the DWT, OCT and FFT views.

# Initial startup screen on MAIN view

Note that the INFO view will be displayed when the app is launched for the first time, and you will see a description of the functions.

The basic operation of this app is as follows.

1) Sound recording

Tap the Record button to make a sound recording. This recorded data will be used for acoustic analysis.

2) Specify the analysis point

　Specify the time point where you want to perform the acoustic analysis. The 5 seconds immediately before the time cursor of the PCM graph will be analyzed.

3) Sound zoom

　By tapping the zoom button (10-sec), the cursor of the 10sec zoom graph is enabled. You can zoom in the PCM data on the just before 10 seconds from the time position of the PCM graph. This function can be used when you want to specify the time in detail.

4) Acoustic analysis

　Tap the Analysis button to perform the acoustic analysis in MAIN view.

5) Analysis Results

　Tap the DWT/OCT/FFT button to see the results of each analysis method.

Functions

Sound recording
Record the sound you want to analyze with the built-in microphone. Tap the Record button to start recording sound with the built-in microphone and temporarily save it as sound data. You can record up to about 180 seconds. The PCM waveform and FFT analysis are displayed in a real-time graph.
Specify the analysis point
The time position slider points to the cursor position (time position) on the PCM graph.

Determine the time position to be analyzed by playing the sound or directly manipulating the time position slider. The sound data from about 5 seconds before the cursor position will be analyzed.
Sound zoom
Zoom in on any 10 seconds on the PCM graph. At this time, the cursor on the 10sec zoom graph is enabled, allowing you to set the time position in more detail by the time position slider. The sound zoom button (10-sec) is effective when recording for more than 20 seconds. If the time is less than 10 seconds, the first 10 seconds will be displayed. The sound data from about 5 seconds before the cursor position will be analyzed. If you want to specify another time position, tap the sound zoom button again to release it.