Table 1.

Anatomical locations of sEMG sensors for subvocal speech recognition and the associated target muscles.

		Location	Muscle
Sensor #	1	Submental: 1 cm lateral, parallel and left of neck midline	Digastric (anterior belly), mylohyoid, geniohyoid, genioglossus
	2	Submental: 4 cm lateral, parallel and left of neck midline	Platysma, mylohyoid, stylohyoid, digastric (posterior belly)
	3	Ventral neck: 1.5–2 cm right of neck midline, rotated clockwise about 30°	Omohyoid, platysma
	4	Ventral neck: 0 cm left of neck midline, and 0 cm below the submental line	Sternohyoid, thyrohyoid
	5	Ventral neck: 0 cm right of neck midline, centered vertically on cricothyroid membrane	Sternohyoid, sternothyroid, thyrohyoid, cricothyroid
	6	Ventral neck: lower 1/3 point of the left sternocleidomastoid muscle	Sternocleidomastoid, platysma
	7	Ventral neck: 0 cm left of neck midline, positioned vertically just superior to the sternum	Sternohyoid, sternothyroid
	8	Face: 2–2.5 cm lateral and right of face midline, parallel to the upper lip edge	Orbicularis oris (upper lip)
	9	Face: 1.5–2 cm lateral and right of face midline parallel to the lower lip edge	Orbicularis oris (lower lip)
	10	Face: 1 cm superior to left mouth corner, parallel to a line between mouth corner and outer corner of the eye	Zygomatic major and minor, levator anguli oris
	11	Face: 2–3.25 cm lateral and left of the face midline, perpendicular to the lip edge	Depressor anguli oris, depressor labii inferioris