Formant Displays

Vowel Production, Word Articulation & Connected Speech

In Video Voice's unique, "F2 vs. F1" matrix display, isolated vowels appear in general regions of the screen, and words have shapes determined by their phonemic components. All models are clinician-defined, so you determine the program content and select appropriate therapy targets for each individual in your caseload.  Symbol positions in the built-in vowel chart are adjustable, so it can be customized for different speakers' voices.

The Sound Spectrogram and Multi-Frequency Displays illustrate the F1, F2 and F3 frequency ranges and offer options for work on  high-frequency sound distortions such as lateralized /s/ or tongue protrusion (lisping).  These displays can help train /s/ and /sh/ distinctions for hearing-impaired speakers and others.

See more about Formant Matrix Displays

The F2/F1 matrix Formant Display can be used in two ways. In the Practice format, the goal is to match the model pattern. The model and trial appear on the screen simultaneously for easy analysis of similarities and differences, with "instant replay" for review as needed. With just a click of your mouse, you can change models "on-the-spot" to let individuals practice against their own voice patterns.

The other matrix display format, Gobble, is an "eat-the-dots" style game that takes the boredom out of drill work and encourages repeated production of targets. Its live feedback also stimulates vocal play and helps speakers find and maintain appropriate articulator positions for vowel and other sound production.

The Temporal Display's cross-time representation of the formant frequencies assists in remediation of durational articulation errors and offers a way to practice segmental targets in a connected speech framework.

The Formant Displays have numerous therapy applications. Auditory feedback reinforces all visual displays, letting speakers both see and hear their productions. Animated cartoon graphics are available to reward good performance in all displays.  Some displays offer scoring against a therapist-defined goal, with selective storage of results for later review.

Learn more about the Formant Temporal Display

Learn more about the Sound Spectrogram

The Multi-Frequency Displays add another dimension for practice, illustrating the F1, F2 and F3 components in various ways.  The Sound Spectrogram shows the contents of three frequency ranges in classic spectrographic fashion, but summarizes the results for each as trace lines.  This display is primarly useful for clinical assessment productions, and samples can be stored.

The Spectrogram trace lines can then be used as models for practice with the Multi-Frequency Temporal and F3/F2 Matrix displays.  This feedback is particularly useful for work on distortions of /s/ and other high frequency sounds.  While the F2/F1 displays can detect only the basic presence or absence of high frequency sounds, the Multi-Frequency displays actually show production errors.  The Temporal display mode represents speech streams in 2-10 second durations.  The F3/F2 Matrix mode also has a live feedback Gobble option.  These displays are not scored, but reward animations can be manually activated, and the patterns can be saved for reuse.

Learn more about the Multi-Frequency Temporal Display Learn more about the Multi-Frequency Matrix Display

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Updated 02/19/2018