Super Nasal-Oral Ratiometry System
SNORS detects nasal and oral airflow during speech to provide a non-invasive objective assessment of velopharyngeal insufficiency (VPI). It uses a lightweight dual chamber mask that is held over the nose and mouth. A soft silicone cuff moulds to the contours of the face providing a comfortable air tight seal. Rapid response airflow sensors and microphones are contained in both the nasal and oral chambers of the mask to enable aerodynamic and acoustic analysis.
When used in combination with icSpeech Professional Edition, the following SNORS parameters are available:
|Nasal airflow||Unfiltered nasal airflow signal|
|Nasal airflow intensity||Low pass filtered nasal airflow envelope|
|Oral airflow||Unfiltered oral airflow signal|
|Oral airflow intensity||Low pass filtered oral airflow envelope|
|Combined airflow||Combined nasal and oral airflow|
|Combined airflow intensity||Low pass filtered combined airflow envelope|
|Aerodynamic nasalance||Percentage of the total airflow that is nasal|
|Aerodynamic ratio||Ratio of the difference between nasal and oral airflow to the total airflow|
|Nasal speech||Nasal acoustic signal|
|Nasal speech intensity||Low pass filtered nasal speech envelope|
|Oral speech||Oral acoustic signal|
|Oral speech intensity||Low pass filtered oral speech envelope|
|Speech||Combined nasal and oral acoustic signal|
|Speech intensity||Low pass filtered speech envelope|
|Pitch||Derived from the combined acoustic signal|
|Acoustic nasalance||Percentage of the total acoustic energy that is nasal|
|Auxiliary||Signal derived from user defined auxiliary channel|
Aerodynamic nasalance should not be confused with acoustic nasalance. Aerodynamic nasalance relates to the effective velopharyngeal closure, whereas acoustic nasalance relates to perceived nasality. Both parameters are useful and complementary.
There are a number of ways in which these parameters can be displayed. All displays can be synchronously viewed in real-time for biofeedback, recorded for off-line assessment or printed for hard copy.
The real-time Bar is a useful biofeedback tool that provides a clear and simple display reflecting the selected SNORS parameter. This allows the speaker to monitor their speech, make corrections, and instantly see the result. Real-time Bar is particularly useful when working with sustained sounds
The real-time Waveform display allows the speaker to see the dynamics of their speech during the utterance of complete words or phrases.
Recording and analysis
Recordings enable precise, repeatable measurements to be performed on the recorded SNORS data. Measurements are made on the waveform display by positioning cursors over areas of interest. The data can also be exported to a comma-separated values (CSV) file for further manipulation.
icSpeech Professional Edition contains six interactive speech therapy games. Each game features adjustable targets, rewards and can be controlled by the SNORS parameters.
|Operating Systems||Windows 10, 8, 7, Vista or XP|
|CPU||Minimum 1 GHz Intel® Pentium® or equivalent|
|Memory||Minimum 1 GB of RAM|
|Storage||100 MB of free hard disk space
|Software||icSpeech Professional Edition|