| Autor: |
Ivey, Elizabeth S., Josephs, Jess J. |
| Zdroj: |
Journal of the Acoustical Society of America; 1979, Vol. 65 Issue S1, pS124-S124, 1p |
| Abstrakt: |
For more than 25 years a course in Musical Acoustics has been offered at Smith College. Demonstrations of some unusual experiments performed by students in this course will be presented. For example: (1) An orchestral piece is played through speakers in a room and tape recorded. The recording is played back in the same room and rerecorded on a second recorder. After repeating this process five times, the last recording provides the room mode vibrations emphasized above all other frequencies. (2) While reading aloud, one's own words are heart through earphones, delayed slightly in time, producing garbled speech. (3) The minimum duration time for pitch perception of a pure tone is shown to depend upon a certain number of cycles being presented, independent of frequency. (4) Binaural hearing is demonstrated using a 'dummy head' made of plastic cups and microphones. (5) Two slightly different pure tones are presented binaurally and then stereophonically. The differences in what one hears in pitch resolution are discussed. In addition, plans for a small inexpensive anechoic chamber will be available. Photographs of one built by Smith College students will be shown. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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