Chapter 10- Standing Waves

Question 0

First natural mode of an OPEN OPEN airfield tube

Answer 0

Wavelength = 2•L

Because one half a wavelength

Question 1

Harmonics

Answer 1

The natural frequencies of the fixed-fixed string. There integer multiples of the fundamental frequency

Question 2

Second natural mode of an OPEN OPEN air filled tube

Answer 2

Wavelength = L

Because one full wavelength

Question 3

First natural mode of an OPEN CLOSED tube

Answer 3

Wavelength = 4L

F1= v/ 4L

Question 4

Second natural mode of an OPEN CLOSED tube

Answer 4

Wavelength = 4L/3

L= 3(wavelength) / 4

F2= 3v/4L

Question 5

The fundamental frequency of the open-open tube is ______ the frequency of the open-closed tube

Answer 5

Twice

Question 6

The open open tube has natural frequencies that are ________ of its fundamental frequency

Answer 6

Integer multiples

N= 1,2,3….

Question 7

Closed open tube has natural frequencies that are _________ of its fundamental frequency.

Answer 7

Odd integer multiples

N= 1,3,5….

Question 8

Impedance

Answer 8

The ratio of pressure measured by the microphone to the volume of air flow produced by the loudspeaker

Question 9

Input impedance

Answer 9

Ratio of pressure to volume of airflow

Question 10

Response curve

Answer 10

How the tube responds (impedance varies) at different frequencies

Question 11

Rooms have ______ which can be composed of 1,2, or 3 -dimensional standing waves

Answer 11

Natural modes