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Re: Subtracting regularly repeating sounds
The task reminds me of some work done by colleagues of mine, separating
the components heart sound signals from stethoscope recordings. In their
case they wanted to keep the repeating part rather than suppress it, but
the basic characteristics of the sound - regular but slowly varying -
are a good match.
M. G. Jafari, F. L. Hedayioglu, M. T. Coimbra and M. D. Plumbley. Blind
source separation of periodic sources from sequentially recorded
instantaneous mixtures. In Proc 7th International Symposium on Image and
Signal Processing and Analysis (ISPA 2011), Dubrovnik, Croatia, 4-6
Sept. 2011, pp 540-545, 2011.
F. L. Hedayioglu, M. G. Jafari, S. S. Mattos, M. D. Plumbley, M. T.
Coimbra. Separating sources from sequentially acquired mixtures of heart
signals. In Proc IEEE International Conference on Acoustics, Speech and
Signal Processing (ICASSP 2011), Prague, pp 653-656, May 22-27, 2011.
On 19/09/12 21:59, Kyle Jasmin wrote:
I wonder if anyone has successfully removed the sound of a helium pump
from auditory recordings made in an MRI scanner. It occurs regularly
(every 1s), and changes over time (Praat thinks it is a formant with
downward trajectory). Any advice is appreciated on subtracting regularly
repeating sounds would be appreciated.
Speech Communication Laboratory, UCL Institute of Cognitive Neuroscience
& Laboratory of Brain and Cognition, National Institute of Mental Health
Postdoctoral Research Assistant
Centre for Digital Music
Queen Mary, University of London
Mile End Road, London E1 4NS