2015 Fiscal Year Final Research Report
A study on three-dimensional sensing of articulatory movements and its application to cognitive sciences
| Project/Area Number |
25540071
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Perceptual information processing
|
|---|
| Research Institution | Kyushu University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Keywords | 音声情報処理 / 発話運動 / 磁気センサ / ３次元計測 / 運動計測 |
|---|
| Outline of Final Research Achievements |
An electromagnetic sensing system was developed to observe the position of multiple receiver coils attached to the surface of the articulatory organs. This system detects the receiver position by measuring signals induced from surrounding magnetic fields and by solving a set of simultaneous equations representing the predicted magnetic fields by using a dipole model of the transmitter coils. Previous studies report a noticeable increase in the position estimation error irrespective of small signal prediction error and the existence of non-uniqueness problem in the position estimation was hypothesized to be the cause of this problem. To resolve the problem, we optimized the alignment of the transmitter coils by maximizing the difference between the receiver signals for any pair of states in the measurement region and evaluated the alignment by performing computer simulations and actual measurement. As a result, measurement error was decreased from 1.58 mm to 0.40 mm.
|
| Free Research Field |
音声情報処理
|
