Week of October 8th

Week of October 8th - Class notes for the week of October...

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Class notes for the week of October 8 th We spent much of this week reviewing for our first midterm, learning about logarithmic scales, and learning how to use the oscilloscope. You will find more information about the latter two topics in your laboratory assignments. Human hearing Human hearing is generally considered to cover the range of 20 Hz to 20,000 Hz. These are nice round numbers, but few of you were ever able to hear to 20 kHz. In any case, your hearing has already begun to decline, and it is unlikely that any of you can presently hear 20 kHz. The situation at 20 Hz is somewhat different, because at these very low frequencies, hearing hands off to the sense of touch. It is not obvious how much of the sensation of a bass drum hit is due to hearing and how much is due to feeling the vibrations on your skin (and in the case of the bass drum your stomach!). Those of you who have gone to hear our marching band at work will know what I am talking about! Human hearing (and our musical scale) is logarithmic in its determination of frequency. Just as the piano keys are set out in a logarithmic sequence, we will be plotting our hearing results with logarithmic frequency scales. Perhaps a little more surprising is the fact that our response to sound is also roughly
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This note was uploaded on 09/26/2008 for the course ESE 123 taught by Professor Westerfield during the Fall '07 term at SUNY Stony Brook.

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Week of October 8th - Class notes for the week of October...

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