Speech Analyzer

Speech analyzer

When we speak, we subconsciously listen to vowel and consonant sounds to ensure we're producing them correctly. If our speech is slightly different from what we intended, we adjust the way we speak to correct for these slight errors.

For some of us, detecting these errors or making the necessary adjustments can be a challenge. That's why we developed the icSpeech Analyzer.

How does the speech analyzer work?

icSpeech Analyzer uses the clinically proven technique of biofeedback to help improve your speech. Biofeedback lets you see your speech on a computer screen in real-time. At first, you learn to control your speech while looking at the display and comparing your speech to an example. Then, with practise, you learn to control your speech without looking at the display.

icSpeech Analyzer supports the following biofeedback displays:

You can also record your speech, create target displays, and perform measurements on a range of speech parameters.

Waveform displays

Waveform displays are useful for controlling speech rate, loudness and pitch. They also show the difference between voiced consonants, voiceless consonants and vowel sounds.

Waveforms scan across the display from right to left, with intensity or frequency plotted vertically and time horizontally. The time taken to scan the entire display can be adjusted to suit your needs.

Waveform Displays

The above example shows a speech waveform (top) and a voice intensity waveform (bottom). This example clearly illustrates the difference between the voiced sound /b/ and the unvoiced sound /p/.

You can also save the waveform display and perform precise measurements on a range of speech parameters, including:

  • Speech rate (independent of pauses or dysfluencies).
  • Speech intensity (loudness).
  • Voice pitch.
  • Voice intensity.
  • Voice onset time.
  • Sentence, word, syllable and phoneme duration.

Bar displays

The real-time bar is a useful biofeedback tool that shows a simple bar, which moves upwards with increased pitch, loudness or voice intensity. This allows you to monitor your speech, make corrections, and instantly see the result. Bar charts are particularly useful when working with sustained sounds.

Bar Displays

The above example shows pitch (yellow bar) and a target (blue bar). Targets are adjustable bars that appear next to the active bar. Depending on the task, you can try to keep below, reach or exceed the target.

Video displays

Video Displays

Mirrors are often used in speech therapy as they allow you to view lips, teeth, jaw, tongue and facial muscles during speech.

Visual feedback, using the built-in webcam feature, takes this a step further. With a webcam you can:

  • Pause your image for closer inspection.
  • Record your video and audio.
  • Practise your speech whilst watching example recordings.

Spectrogram displays

A spectrogram is a visual representation of sound. It scans across the display from right to left, with frequency plotted vertically and time horizontally. The intensity of sound, or loudness, is indicated by grey scale or color intensity. The spectrogram below clearly shows the difference between the /r/ sound and the /w/ sound.

Spectrogram Displays

Studies have shown that some people, especially children, have difficulty detecting when they misproduce certain sounds. Spectrograms provide additional feedback, helping you to match your speech to a visual target. At first, you rely on visual feedback and learn to ignore your auditory feedback (people often say their correct speech production sounds wrong). Once you've mastered the correct speech production, you can start to rely more on your auditory feedback and less on the visual feedback.

Spectrograms can be particularly useful for people that substitute the following sounds:

  • /w/ for /r/
  • /w/ for /l/
  • /m/ for /b/
  • /p/ for /b/
  • /s/ for “sh” or vice versa

Spectrum displays

The spectrum display provides an alternative method of visually representing the acoustic signal. The display is ideal for viewing fundamental frequency (pitch), harmonic frequencies, and formant frequencies (vocal tract resonances). Speech intensity, or loudness, is plotted vertically and frequency horizontally.

Spectrum Displays

The above displays illustrate the frequency spectrum for the vowel sound /i/. The top display (FFT) shows the fine spectral detail associated with the fundamental frequency and its harmonics. The bottom display (LPC), highlights the formant frequencies by removing the fundamental and harmonic frequencies.

System requirements

Operating Systems Windows 10, 8, 7, Vista and XP
CPU Minimum 1 GHz IntelĀ® PentiumĀ® or equivalent
Memory Minimum 1 GB of RAM
Storage 100 MB of free hard disk space
Microphone Any PC compatible microphone
Webcam (optional) Any USB Windows compatible webcam

Download free trial

icSpeech Analyzer is now only available as part of the icSpeech Standard and Professional integrated applications.

To download a free trial of icSpeech Standard Edition, simply click on the download button and follow the installation instructions.

For best results, we recommend using a USB headset microphone. See our range of recommended microphones.

icSpeech Standard Edition
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On order completion, you will immediately receive:

  • A secure download link to the latest product version.
  • A product registration key.
  • Priority technical support.
  • Free product updates.
  • A 30-day money back guarantee.
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"I think icSpeech is awesome! My children love computers and particularly like using the webcam as a virtual mirror. It's nice to be able to record the session too."

Speech & Language Pathologist,
Kentucky, US