Instrumentation
| Airflow Measure | Aerophone II | Laryngograph | CSL -- Computerized Speech Lab | Dr. Speech |
| High-Level Speech Synthesizer | Video Stroboscopy |
Nasometer
It derives an acoustic index of perceived nasality. it is tied to an inappropriate coupling of the nasal cavity to the vocal tract that disrupts normal speech resonance. This device uses two directional microphones mounted on either side of a sound-separating plate to transduce oral and nasal sound pressure signals individually.
Airflow Measure
It is used clinically to measure the mean airflow rate during sustained phonation.
Aerophone II
It is a voice function analyzer developed to bring advanced airflow and air pressure measurement technology to clinical use with applications in speech-language pathology, linguistics, and otolaryngology. It involves a sophisticated hardware system, including transducers for airflow, air pressure, and sound pressure level recording, and computerized data processing with program software on PC.
Laryngograph
It measures vocal fold contact and the signal from it can derive a waveform representing the variations in conductance. Then the waveforms provide the basic for physical interpretation of pathological voice conditions. Some of the features that can be investigated include: vibration regularity, closure and opening definition, open/close phase ratio, closure/opening sequence shape.
CSL -- Computerized Speech Lab
It is a hardware and software system. Operations include speech acquisition, a variety of acoustic analysis functions, graphical and numerical display of speech parameters, playback of speech signals, signal editing, and storing speech to disk memory. It is suitable for any acoustic signals characterized by changing spectra over time.
Dr Speech
It includes different software that can provide programs for a variety of speech analysis, vocal assessment, voice synthesis and therapy, voice range profile (phonetogram), and real-time video capture and analysis system. The software is designed specifically for otolaryngologists, voice pathologists, voice scientists and voice researchers.
Above: the phonetogram
High-Level Speech Synthesizer
It provides an integrated graphical environment for specifying, creating, analyzing and comparing synthetic speech files using high-level synthesis.
Video – Stroboscopy
Stroboscopic examination is the most practical technique for examining the vibratory pattern of the vocal folds. It can be used to observe and describe: fundamental frequency, symmetry of the bilateral movements of vocal folds, regularity of successive vibrations, glottal closure, amplitude of the horizontal excursion, size of the mucosal wave and non-vibrating portion of the vocal folds.
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