EVA2 system was
designed to allow measurement of most data currently used for evaluation of
speech production including sound wave, pitch, intensity, airflow, and
pressure.
EVA2 has proven to be a
valuable tool to assist physicians not only in diagnosis of speech disorders
but also in follow-up after surgery, medical treatment, and voice therapy.
A large set of acoustic, aerodynamic and electrophysiologic sensor devices are interfaced to a PC computer. Data acquisition and display are controlled from the computer using software applications specifically developed for each phonatory function test.
EVA2 is a multipurpose workstation that can handle a variety of phonatory function tests. The workstation concept presents several advantages:
A workstation for robust signal analysis requires a high-quality hardware equipement. The EVA2 system offers professional sound quality:
Recordings are made using high-end calibrated microphones allowing
- excellent sound quality
- calibrated measurement of intensity
High-quality acquisition
- powerful signal processing
- adapted filtering
- 16 bits Analog-to-digital conversion
The EVA2 system offers easy-to-use facilities:
two-channel sound allow multiple operating configurations
- voice and electroglottograph (E.G.G.)
- patient and speech therapist
Stereophonic playback through either headset or 30W loudspeaker
Input connections for recording from tape player, CD player
Output connections for audio tape recording
Aerodynamic measurements (airflows and pressures) are necessary to
A range of Windows software applications have been developed for phonatory function testing using the EVA2 system. Each application was designed for fast and easy data acquisition and processing. Data presentation has been optimized for clinical use.
Clinical applications (See details):