Lesson 12

Question 1

Sound waves are normally three-dimensional but when a sound wave travels in a long narrow column of air (instrument) they become…

Answer 1

One dimensional

Question 2

Frequencies at which standing waves occur are known as

Answer 2

Harmonic frequencies

Question 3

Each harmonic frequency is a whole number multiple of the lowest harmonic frequency which is called the

Answer 3

Fundamental frequency

Question 4

Under such conditions it is possible for sound to form a….

Answer 4

Standing wave

Question 5

When a standing wave is formed, the air column will

Answer 5

Resonate

Question 6

The shortest closed tube in which resonance can occur is called the

Answer 6

First resonant length

Question 7

The frequency of the sound that resonates at the first resonant length is called the

Answer 7

Fundamental frequency

Question 8

In the case of a closed pipe resonator, resonance will occur whenever….

Answer 8

There is a node at the closed end and an antinode at the open end.

Question 9

In closed pipe the first resonant length occurs at a length of ____ of the wavelength of sound

Answer 9

1/4

Question 10

An open pipe column resonance will occur….

Answer 10

Whenever there is an antinode at both ends

Question 11

The resonant lengths of an open pipe resonator are multiples of _____ wavelength

Answer 11

1/2