The sonar transducer emits a high-frequency sound wave that bounces back from objects that are within
range of the sonar. The resulting sound waves or echoes that bound back are detected and processed to
obtain information about the
object’s
proximity. This information is converted into vibratory patterns or
pulses that you feel on your wrist. Generally, the vibration pulses become more frequent as an object
becomes closer or less frequent as the object becomes farther away.
Our mobility guide will introduce you to the principles of echolocation, and you will practice
detecting objects with the Sunu Band.
The Obstacle Detection app allows you to:
•
Activate the sonar sensor and vibration feedback.
•
Switch between sonar modes.
Activating the Obstacle Detection App
1.
Press the Navigate button
to activate the sonar. When you press the button, Sunu Band will
immediately vibrate to indicate that the app is now active.
2.
After a brief pause, you will feel one or two pulses to indicate the sonar mode.
3.
After another short pause the Obstacle Detection App will be active and working in the selected
mode. You can aim the sensor in different directions or pass your hand in front of it to make sure that
it is working properly.
Switching Between Sonar Modes
The Sunu Band has two sonar operating modes:
1.
Short range (indoor) mode
: allows you to detect obstacles at 6 ft. or 1.8 meters and has low
sensitivity. This mode is ideal for navigating indoors and crowded spaces. Its low sensitivity allows
for gaps, doorways and thresholds to be readily detected.
2.
Long range (outdoor) mode
: allows you to detect obstacles within 16 ft. or 4.8 meters and has high
sensitivity. This mode is ideal for navigating outdoors and in wide open spaces. Its high sensitivity is
optimized to detect thin objects like tree branches and bushes.
Swiping In or Out
on the
touchpad
switches between sonar modes.
1.
Swipe-In
to switch to the short range mode. You will immediately feel one pulse to indicate that this
mode is on.
2.
Swipe-Out
to switch to the long range mode. You will immediately feel two pulses to indicate that
this mode is on.
Exiting the Sonar & Obstacle Detection app
•
Press the HOME button to exit and return to HOME.
Gestures Control
