Project+Notes

Q: Difference in amplitude between saxophonist and singer when playing/singing with natural resistance? Decibel meter - measures dB Played Bb concert on sax "A Weighting" ("actual" reading of the dBs - more accurate) "C Weighting" (more replicates human hearing - receives high frequencies less intensely - less accurate, loses some sound) Soprano sax is louder (larger amplitude) because the instrument itself is an amplifier. The dial is like an old scale - twist it to an approximation, and then the needle will show you +/- When you double the distance, the amplitude of the constant sound drops 6 dB "U Setting" (measures lower frequencies that can't all be heard by humans: 3-100 mHz)
 * Lia & Keith: Amplitude**

Q: Determine length of the tubes beneath a marimba - find formula for finding the length of the tube to make it vibrate as much as possible Found wavelength and length of A-440 tube - wavelength found by c (speed of sound: 1130) / f (440Hz) The length of the tubes on the marimba are 1/4 the actual size length (of tube) = 4 / wavelength (of note) To amplify a certain frequency, you multiply your fundamental by the constant of 4. Then divide the speed of sound by your new frequency.
 * Ray & Dylan: Marimba**