#audio feedback

[pavel-nosok]

Stop Giving 'Praise Sandwich Feedback' (and What to Do Instead)

Stop Giving ‘Praise Sandwich Feedback’ (and What to Do Instead)

If you’ve ever had a manager, you’ve likely received feedback; feedback which may have been delivered via a “shit sandwich,” where negative feedback was packaged between two layers of positivity. (It’s alternately known as a “praise sandwich” which is not nearly as fun to say.) This approach involves first… Read more…

View On WordPress

[rahulsamuel]

How to Avoid Feedback

How to Avoid Feedback

Rock guitarists are known to use feedback as an effect but for most of us, it’s almost always considered undesirable. What is feedback? Also known as Audio Feedback, Acoustic Feedback or Larsen Effect. It is a positive feedback loop that exists between audio input and audio output of a PA system. By now, we have all experienced that the easiest way to cause feedback is to point a microphone…

View On WordPress

[sciencesideanswers]

If I put a microphone up to a speaker and I mad a noise in the microphone, would the sound infinitely loop through the speaker and mic, or would the frequency not be enough to keep going?

Yes, absolutely. This is what’s called audio feedback, and it’s that high-pitched sound that people use to signal uncomfortable situations on the stage. (That link has an audio file that you can listen to.)

This is, of course, assuming that the microphone will be able to pick up what comes out of the speaker, and that the sound is loud enough (intensity, volume) to not fade away.

The frequency itself is not a problem. This can happen with low or high frequencies, but they final frequency (the “result”) actually depends on the resonant frequency of the space. Which means, basically, how the environment and the instruments itself affect the sound and how that particular resulting sound “stabilizes” after mixing with itself several times.

[greenhubscitech]

Finger-mounted reading device for the blind http://goo.gl/r1j2yX - SciTech News - #Blog, #emergingtechnology, #Technology

http://scitechnews.co.uk/blog/finger-mounted-reading-device-for-the-blind/

Finger-mounted reading device for the blind

Researchers at the MIT Media Laboratory have built a prototype of a finger-mounted device with a built-in camera that converts written text into audio for visually impaired users. The device provides feedback—either tactile or audible—that guides the user’s finger along a line of text, and the system generates the corresponding audio in real time.

“You really need to have a tight coupling between what the person hears and where the fingertip is,” says Roy Shilkrot, an MIT graduate student in media arts and sciences and, together with Media Lab postdoc Jochen Huber, lead author on a new paper describing the device. “For visually impaired users, this is a translation. It’s something that translates whatever the finger is ‘seeing’ to audio. They really need a fast, real-time feedback to maintain this connection. If it’s broken, it breaks the illusion.”

Huber will present the paper at the Association for Computing Machinery’s Computer-Human Interface conference in April. His and Shilkrot’s co-authors are Pattie Maes, the Alexander W. Dreyfoos Professor in Media Arts and Sciences at MIT; Suranga Nanayakkara, an assistant professor of engineering product development at the Singapore University of Technology and Design, who was a postdoc and later a visiting professor in Maes’ lab; and Meng Ee Wong of Nanyang Technological University in Singapore.

The paper also reports the results of a usability study conducted with vision-impaired volunteers, in which the researchers tested several variations of their device. One included two haptic motors, one on top of the finger and the other beneath it. The vibration of the motors indicated whether the subject should raise or lower the tracking finger.

Another version, without the motors, instead used audio feedback: a musical tone that increased in volume if the user’s finger began to drift away from the line of text. The researchers also tested the motors and musical tone in conjunction. There was no consensus among the subjects, however, on which types of feedback were most useful. So in ongoing work, the researchers are concentrating on audio feedback, since it allows for a smaller, lighter-weight sensor.

Source: Phys Org

#Blog, #emergingtechnology, #Technology

[videofeedback]

Feedback Loops: How nature gets its rhythms by Anje-Margriet Neutel

While feedback loops are a bummer at band practice, they are essential in nature. What does nature’s feedback look like, and how does it build the resilience of our world? Anje-Margriet Neutel describes some common positive and negative feedback loops, examining how an ecosystem’s many loops come together to make its ‘trademark sound.’

via Ted-Ed

[drewfernando]

The Feedback Incident II 2009

[aliyappa]

Sports Tracker App Released v1.0.1.12 Adds Heart Rate Alarm on Windows Phone 8

Sports Tracker App Released v1.0.1.12 Adds Heart Rate Alarm on Windows Phone 8

Your mobile phone is a sports fitness device to track every moment. Sports Tracker is an App that has recently gotten a new update v 1.0.1.12 for the Windows Phone device. The app can customize your sports training logs and tracking facilities through your achievement and its allow you to share your statistics with friends and colleagues. Sports Tracker has added Heart rate alarm, and some major…

View On WordPress

[0000ff]