acoustics & signal processing

Spectrogram

This javascript app calculates a spectrogram from the input to your computer's microphone. (You may have to adjust the sensitivity a bit.) A spectrogram is in some ways similar to the activity pattern that auditory nerve fibers send to your brain, so you can use this spectrogram app to visualize what various sounds or speech would "look like" to your brain. You can pause the spectrogram by clicking on it.

Lectures

 

 

Lecture handouts and some video recordings of lectures given to the 2nd year biomedical science course in Audiotory Neuroscience.

 

1) The nature of sound

2) Ear and Brain

Why Missing Fundamental Stimuli are Counterintuitive

The fact that tone complexes with missing fundamentals can be perceived to have a pitch that is below their lowest frequency component can have counterintuitive consequences.

Consider the tone sequence shown in the spectrogram here:

 

 

Music to Deaf Ears - podcast

This podcast by science journalist Dr Carinne Piekema explores how hearing loss affects people, in particular how it affects musicians, and what modern prosthetic devices such as hearing aids or cochlear implants can and cannot do for these patients. It contains insightful interviews with inspirational deaf musicians, some of the UKs leading hearing researchers, as well as simulations designed to show to normal listeners what it would be like to have to rely on a hearing aid or a cochlear implant.

You can listen to the podcast here,

converting brain waves into sound & vice-versa

Hey,

 

Can this be done?

Is it possible to record the electrical brain pattern of a human in different states (walking, running, angry..etc..) and tranform these into sounds?

 

What would be the effects of playing this back to the subject?

 

I am considering this as my dissertation topic for my MSc, any ideas/ knowledge  in this field are highly welcome! 

 

Gal.m

Virtual Acoustic Space

The numbered squares signify the sound directions corresponding to a series of "virtual acoustic space" stimuli, which were generated by convolving a stimulus - in this case, a series of tapping sounds - with the head-related transfer function of one of the authors of this book.

Time intensity trading

Move the mouse cursor over the grid below to hear a harmonics complex tone with ILDs and ITDs as indicated.

You should listen to these sounds over headphones, and this demo may not work for you if you have a significant hearing loss in one ear, or if the sound card on your computer is of poor quality and does not separate the two stereo channels well.

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