31 Dec '13, 3pm

New post: Acoustic Wayfinder for the Visually Impaired

Ideally, technology is supposed to enhance our lives. [Shane and Eileen], two seniors at Cornell have found a great way to enhance the lives of visually impaired individuals with their acoustic wayfinding device . In brainstorming for their final project, [Shane and Eileen] were inspired by this Hackaday post about robots as viable replacements for guide dogs . They sought to provide wearable, hands-free guidance and detection of (primarily) indoor obstacles—namely chairs, benches, and other inanimate objects below eye level. The wayfinder comprises two systems working in tandem: a head-mounted navigation unit and a tactile sensor worn on the user’s finger. Both systems use Maxbotix LV-MaxSonar-EZ0 ultrasonic rangefinder modules to detect obstacles and vibrating mini-disc motors to provide haptic feedback at speeds proportionate to the user’s distance from an obstacle. The...

Full article: http://hackaday.com/2013/12/31/acoustic-wayfinder-for-the...

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New post: 3D Acoustic Manipulation: Seeminly-Unreal Levitation Using Soundwaves

New post: 3D Acoustic Manipulation: Seeminly-Un...

hackaday.com 03 Jan '14, 3pm

Using a series of standing ultrasound waves, it is possible to suspend small particles at the sound pressure nodes. The ac...