Interesting Video on filming small motions like voice resonances

[anjaq]

Michael Rubinstein: See invisible motion, hear silent sounds #TED : http://on.ted.com/h0iSp

I just saw this and check out about 8 minutes in. They film the neck and this larynx of someone speaking or singing and you can see with the motion enhancement they present there, how the resonances act and where out resonates. I wonder how to apply this to voice training for trans people. Apparently the software is not commercial and one can even upload videos and enhance them online.

Can we use this to train gender specific resonances?

[Lynne]

I think it could be useful, but even if the software is not commercial, the hardware needed to record videos of such high frame rate at adequate quality is not cheap, although getting cheaper.
It would be interesting to visualize what all the voice training videos are talking about when mentioning chest voice etc.. This technology could provide almost instant feedback.

[anjaq]

Oh - I was not sure - some of the videos used regular camera recordings - the videos that were used to extract voices were high speed, but was tha tone with just showing that there is vibration and where it is not a regular framerate video? We are not trying to record the voice as in the last part of the video, just trying to find which parts of the throat do have any movement in them at all... for that a low framerate might be ok?

[Lynne]

Most of the videos were using normal frame rates but the larynx video was 2000 frames per second, which is not as high as the voice recording videos but still higher than what most cameras can do.
I may do some experiments with the program to see if normal frame rates are enough for our purposes, I just have to find something that can record video at a good enough quality.

[anjaq]

Aww - ok. 2000 fps is of course not practical for everyday use. It would only be something for gender voice therapists to set it up in their room but its hardly worth that then. Must be some 1000 $$ for such a camera

[ImagineKate]

Prices are coming down on those cameras. Even your stock iPhone can do 240fps recording.

[Lynne]

I tried to find an adequate camera for the job, but at the moment I don't have anything that is capable, the best I have can do 640x480 at 25 FPS and even that is broken now. The problem is that we need quite good FPS, low noise levels and good resolution to detect motion made by the sound. I'll try to borrow a better camera when I have time.