week 9c - Physics 1240 Thurs Today Just a little on...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Physics 1240 Thurs 3/10/2011 Today: Just a little on Consonance and Dissonance, Begin Stringed Instruments Next time: Stringed instruments, natural modes of vibration, percussion instruments Outline- Quick review of last time - Consonance and dissonance - Natural modes of a string or “standing waves” - Sound radiation from stringed instruments CQ 9.5 According to Pythagoras, the Perfect 4 th interval should be what ratio of higher to lower frequency? A) 2.5 B) (twelfth root of 2) 5 = (2) 5/12 C) 4/3 D) none of the above Need to know… Interval example ratio half steps Major 3 rd C to E 5/4 4 4 th C to F 4/3 5 5 th C to G 3/2 7 Octave C to C’ 2 12 half step = a factor of (2) 1/12 = a factor of 1.05946 whole step = two half steps = a factor of 1.12246 CQ 9.6 Construct the A major scale starting on A=100 Hz. I. Are the letter names of the notes of the first three notes? A) A,B,C B) A,B#,C# C) A, B, C# D) A, C, D Frequency and Pitch Table half step = (2) 1/12 CQ 9.7 Construct the A major scale starting on A=100 Hz. II. What are the frequencies of the first 3 notes A) 100.00, 112.25, 121.21 B) 100.00, 112.25, 122.55 C) 100.00, 105.95, 112.25 D) none of the above, these answers have at least one frequency off by 1% or more. least one frequency off by 1% or more....
View Full Document

This note was uploaded on 05/01/2011 for the course PHYS 1240 taught by Professor Holland,murray during the Spring '08 term at Colorado.

Page1 / 39

week 9c - Physics 1240 Thurs Today Just a little on...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online