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Re: Testing whether some humans can hear high frequencies inaudible to "normal" humans

Such behavior is not uncommon in children with autism or autism spectrum disorders. Does this child have a history of learning disabilities?
I would imagine this is a lot easier to evaluate than whether the child has supersonic hearing.

Harriet B. Jacobster, Au.D., CCC-A, FAAA
Board Certified in Audiology

Divakaran, Ajay wrote:

Dear List,


My friend thinks that his child can hear frequencies that are inaudible to other humans because of which he sometimes reacts with alarm that no one else understands. Is there a way we can verify this systematically? In my electronics lab during my undergrad one of my friends tested my hearing by varying the frequency output of a signal generator. Is there  a possibility of doing that on a PC?


Also, I would highly appreciate any references on music therapy for language delayed children. I am interested in vocal music training in particular but would appreciate any general music training as well for therapeutic purposes.


Best Regards,



Ajay Divakaran, Ph.D.
Technical Manager
Vision and Multi-Sensor Systems
Sarnoff Corporation
201 Washington Road
PO Box 5300
Princeton, NJ 08543


Phone: 609-734-2204

Cell: 609-578-7065
Fax: 609-734-2662