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(MAG-0580) Time Summation in Sound Perception


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Time Summation in Sound Perception (MAG-0580)

Principal Investigator:
Marcelo Magnasco Ph.D.

Investigators:

Contact Information:
Marcelo Magnasco, PhD
Rockefeller University
1230 York Avenue
New York, NY 10021
Telephone: 212-327-8542
FAX: 212-327-7422
Email: marcelo.magnasco@rockefeller.edu
Enrollment Status:
Completed/Closed

Brief Summary of Protocol:
In this study, we concentrate on the hearing threshold, that sound intensity below which a given sound is inaudible, and its relationship to the duration of the sound. To this end, subjects are asked to stay for approximately one hour in a sound-proof booth; extremely soft sounds are played through headphones, and the subject indicates on a computer keyboard when the sound was audible.

This is a Psychoacoustical Study



Detailed Description of Protocol:
We want to understand how the intensity of the sound is summed in time to reach a perception. In this study, we concentrate on the hearing threshold, that sound intensity below which a given sound is inaudible, and its relationship to the duration of the sound. Short sounds have to be rather loud to be heard, while longer sounds can be fainter; we aim to get a precise characterization of how loud sound needs to be to be heard, as a function of the duration of the sound. To this end, subjects are asked to stay for approximately one hour in a sound-proof booth; extremely soft sounds are played through headphones, and the subject indicates on a computer keyboard when the sound was audible. This is a study of normal function, and so we seek volunteers with normal hearing. A great deal of concentration is required to perform this task for a period of one hour. Noises made during the session mask the faint sounds we use in the study, invalidating the data. So, for instance, if the subject is restless and cannot sit still for one hour (making noises with clothing or feet), or the subject has a cold (sneezing, sniffling, plugged ears), the subject is ineligible to participate at that time.



What specifically makes a person eligible for the study?
You may be eligible to enter this study:

Healthy subjects with normal hearing,

Able to sit still and quietly,

Able to concentrate at a listening task, in a dark and very quiet sound booth, for a period of one hour.



Gender:
Both

Age(s):
18 years to 40 years old

Children permitted to participate:
No

Potential Benefits.....
None



Compensation:
$15