Motion Computing M1400 manual Focusing and Training the Microphones, Narrow Focus

	Chapter 4 Using Your Motion Tablet PC
MICROPHONE	The Tablet PC contains two microphones with features that help optimize
DESIGN AND	the sound capturing capabilities of your Tablet PC for voice recognition and
FUNCTIONS	Voice over IP (VoIP):
	• Array Processing or “beam forming” software—Removes all sound out-
	side the angle of acceptance
	• Noise Supression—Removes background and ambient noise
	• Acoustic Echo Cancellation (AEC)—Removes echo caused by micro-
	phone pick up of the system’s speaker output and prevents feedback.
	Focusing and Training the Microphones
	The microphones can be focused to several angles—narrow, wide, full-
	room—and can be trained to detect sound from in front of or to the side of
	the Tablet PC, or in the entire room.
	Narrow Focus
	You may want to focus the microphones to a narrow angle in a “voice-noisy”
	environment (such as in a meeting) or for dictation or Internet phone use (for
	Voice over IP—VoIP).
	1. Open the Motion Dashboard.
	2. Under Microphone, tap Narrow
	Focus. The microphone now
	has a narrow “angle of accep-
	tance” that focuses on a spot
	near the center of the display
	when the Tablet PC is in an
	upright viewing position.
	To change the microphone focus for dictation or VoIP:
	NOTE: Set the Microphone slider to between 50% and 75% and NOT as shown
	in this illustration.
	1. Open the Motion Dashboard.
	2. Under Microphone, tap Narrow
	Focus.
	3. Position yourself at the new
	location where you want the
	microphone to detect the sound.
	4. Tap Train. A block of text
	appears.
	5. Speaking normally towards the Tablet PC microphones, read the text
	aloud. This takes 20-40 seconds. When the microphones are focused,
	the text disappears.
	IMPORTANT: The microphones keep the new setting until you retrain them or
	until you change the microphone to a different focus. When you change to
	another setting (such as “Wide” to “Meeting”), the microphones return to the
	default focus.
	Motion Computing M1400 Tablet PC User Guide 53