Electropalatography (EPG) System
The LinguaGraph electropalatography (EPG) system monitors tongue contact with the hard-palate during speech. Electropalatography provides direct articulatory information that can be used to monitor and improve articulation patterns.
The lightweight portable design and Skype compatibility makes LinguaGraph ideal for clinical or home-based articulation therapy.
How electropalatography works
Electropalatography determines tongue-palate contact by using a special artificial palate that contains 62 electrodes embedded on its lingual surface. A small electrical signal is sent to the patient, which is conducted through the tongue to any touched electrodes. These tongue-palate contact patterns are then displayed on a computer screen.
The figure below shows six tongue-palate contact patterns observed in normal English-speaking adults when producing lingual consonants:
LinguaGraph is compatible with the Reading electropalatography palate design. The palate is custom-made for each patient and simply clips to the upper teeth. The wires from the palate are connected to the LinguaGraph unit, which is worn around the neck.
Please contact us for details about our EPG palate service.
LinguaView is free, easy-to-use software that is ideal for home use:
icSpeech Professional Edition
LinguaGraph EPG is compatible with icSpeech Professional Edition (sold separately), which supports a wealth of additional features, including:
The above image shows the tongue-palate contact patterns recorded for /s/ in the word "Smoke".
EPG template matching compares the patient's tongue-palate contact pattern with an EPG template. The comparison is expressed as a percentage (0% = no match, 100% = perfect match) and can be used to control a series of games. In the above example, there is an 85% match between the patient tongue-palate contact pattern (red) and the EPG template (blue) for /k/.
icSpeech Professional Edition contains six interactive speech therapy games. Each game features adjustable targets, rewards and can respond to a number of EPG parameters.
Remote articulation therapy
When connected to a computer via USB, LinguaGraph is recognised as a standard webcam. This enables LinguaGraph to be used with Skype and other videoconferencing software for remote articulation therapy.
To arrange a live Skype demonstration, please contact us.
|Supported operating systems||Windows 10, 8, 7, Vista, XP|
|Supported computers||Desktop, laptop, tablet|
|Connectivity||USB 1.0, 2.0, 3.0|
|Power||USB bus powered
|Maximum frame rate||100 frames per second|
|Skype compatibility||Skype for Windows desktop, version 7.0 and later|