Voice and Speech Systems

Products > Voice Diagnostics

Vaghmi_Pro Diagnostics
a comprehensive system for diagnosis of voice disorders

Vaghmi_Pro Diagnostics is useful to

Speech pathologists
Oto-laryngologists
ENT specialists
It is also useful in education and research towards the understanding of human voice

Vaghmi_Pro Diagnostics is easy to operate and user friendly software package. It requires no programming skills.

What is Voice Diagnostics?

Immense research in the area of acoustic analysis of speech signal has identified the acoustic parameters that help in the diagnosis and treatment of voice disorders. It is important and imperative to make an objective assessment of voice at pre and post operative stages instead of subjective evaluation. Follow-up therapy also becomes essential.

Features

Vaghmi_Pro Diagnostics implements techniques for the measurement of clinically relevant parameters turning a personal computer into a powerful diagnostic equipment. Implementation is both efficient (fast) and accurate. It presents the parameters in appealing graphic forms and generates meaningful clinical reports along with the Normative data. The measured parameters are saved in standard Database format.

Reports can be printed with/without Normative data. Reports can be printed on clinic's letter head with clinic's logo.

Typical Graphic Outputs

Typical Reports

Modular Design

Customer has three options for placing orders on Vaghmi_Pro Diagnostics:

Basic Diagnostics: Includes Basic Acoustic Analysis and On-line measurements

Advanced Diagnostics: Includes Basic Diagnostics + Advanced Features + Physiological Modules

Advanced Diagnostics+Spectrograph: Includes Basic Diagnostics + Advanced Features + Physiological Modules + Spectrograph

Basic Diagnostics

Basic Diagnostics includes

Basic Acoustic Analysis of phontation (sustained vowel) and speech (vowel with F0 glide or an utterance)

On-Line Measurements

The following calculations are made in Basic Acoustic Analysis:

F0 and Intensity Measurements : Mean, standard deviation, maximum, minimum, range, rate and range of fluctuations etc.
Jitter and Shimmer Statistics, Histograms and Correlograms. Harmonic to Noise Ratio. Sub-Harmonic to Fundamental Amplitude Ratio.
Calculation of F0-contour, Intensity-contour, Phonetogram, Alfa, Beta and Gamma ratios.

'On-Line' implies measuring while the subject is phonating/speaking. Appropriate graphic feedback is provided. Automatic detection of voicing or frication or voiced frication is made for S/Z Ratio measurement. The On-Line Measurements are:

Maximum Phonation Duration

S/Z ratio

Nasalence and Tonar

Diadacho-kinetic rate (DDK)

Note:Nasalence meaurement requires SIU-D and two microphone setup as an accessory.

Advanced Diagnostics

Advanced Diagnostics Module includes

Basic Diagnostics described above

Advanced features and

Physiological Module - EGG

Physiological Module- Acoustic Glottography

Advanced Features

With this module the user can control the variables for analysis. Display of parameters in detail along with cursor facility is provided to read the values at cursor location. Additional display screens are available. Example: Display of period-to-period variations. Tremor in F0 and Intensity. Multiple reports (Crystal report) can be generated for the same utterance. F0 can be superposed on the narrow-band spectrogram. User can interactively select the location for marking the glottal or EGG and obtain frame-by-frame variation and also validate the results. Event Analysis menu option displays the signal waveform and auto-correlaiton at the frame selected. This is useful for setting the options. Facility is provided for Display of phonation/speech signal and graphic editing (VagPro_Utility program comes with the Advanced Features Module.)

Physiological - EGG

EGG instrument is required as an accessory to make use of this meaurement. EGG signal is displayed. Physiological events are markerd automatically. User can edit these locations. Parameters such as open time, open phase, closed time, closed phase etc are measured. Recorded EGG can be compared with pre-stored EGG patterns of vocie disorders.

Physiological - Acoustic glottography

Phonation signal is inverse filtered to remove the formant data and obtain glottal flow and its derivative. Inverse filtered signal or the acoustic glottogram is displayed. Important physiological events are automatically marked. User can edit these locations. Parameters such as open quotient, speed quotient, spectral-roll-off etc. are measured. Recorded glottogram can be compared with prestored glottograms of vocie disorders.

Advanced Diagnostics with Spectrograph Analysis Option

This is an additional feature built-into Advanced Diagnostics. This feature can be used to obtain Wide-band, Narrow-band, very-wide-band spectrograms either in Gray or color with options to change gain, contrast, frequency axis unit and/or range, obtain spectral section. Hardcopy print out of spectrograms can be obtained. F)-contour can be overlaid on the narow-band spectrogram.

PC Requirement, Support Hardware and Accessories (Click to open the link.)

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