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Re: Non-phonological stimuli
The International Telecommunications Union (ITU) has published a recommendation for Artificial Voice which "is a signal that is mathematically defined and that reproduces the time and spectral characteristics of speech", yet contains no phonetic information.
You can download the recommendation (free for a limited time) in PDF format at: http://www.itu.int/rec/T-REC-P.50/en
The appendix of the recommendation includes a speech database CD which contains male and female nonsense speech samples. Listening to them is quite odd, but seriously useful if you are concerned with getting your signals through a voice activity detector or speech vocoder.
I hope this helps. Let me know if you have any questions.
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I am doing a project involving phonological processing using auditory
words and pseudowords. I am trying to find a good non-phonological
control stimulus that does not contain recognizable phonemes, but
still has similar characteristics and complexity to speech. An ideal
solution would be some kind of filtering or distortion that I could
apply to my existing word stimuli so that each word is matched with
its own control, but I would be open to independently generated
stimuli as well. I have tried playing the words backwards, and have
experimented a little with band pass filtering, but the results still
end up sounding too "phonological." Does anyone know of better
options? Since we're doing a matching task, each control stimulus
would also have to be unique sounding enough for our subjects to
Thank you in advance,