Questions from Quiz 6 Flashcards
John has two tubes, A and B, of the same length. Tube A is open at both ends, while Tube B is closed at one end. Which of the following statements are true? (Select two correct answers.)
a) Tube B will accommodate ¼ of the wavelength of the first standing wave.
b) Tube A will accommodate half of the wavelength of the first standing wave.
c) The frequency of the first standing wave in Tube A will be half that of Tube B.
d) The frequency of the first standing wave in Tube A will be double that of Tube B.
a) Tube B will accommodate ¼ of the wavelength of the first standing wave.
b) Tube A will accommodate half of the wavelength of the first standing wave.
Which of the following are true when you produce a sustained vowel like [ɔ:]? (Two correct answers.)
a) The filter(s) your vocal tract is/are band-pass filters.
b) Your supra-laryngeal cavity acts as a single filter.
c) Your supra-laryngeal cavity acts like it has multiple filters in sequence.
d) The filter(s) your vocal tract is/are low-pass filters.
a) The filter(s) your vocal tract is/are band-pass filters.
c) Your supra-laryngeal cavity acts like it has multiple filters in sequence.
Which of the following statements are true for open-open tubes in acoustics?
a) A tube of smaller radius will resonate a higher frequencies.
b) You do not need to know the volume of the tube to find the resonant frequencies
c) They resonate at odd multiples of the fundamental frequency.
d) They resonate at even multiples of the fundamental frequency.
b) You do not need to know the volume of the tube to find the resonant frequencies
c) They resonate at odd multiples of the fundamental frequency.
You are analyzing a speech recording of a speaker pronouncing vowels, and you are interested in isolating the frequency components to study fricatives like [s] and [ʃ], not the vowels. What type of filter would you apply to focus only on the fricative frequencies and above?
a) Low-pass filter
b) Band-pass filter
c) High-pass filter
d) Low-pass filter followed by high-pass filter
c) High-pass filter
Which one is true about the boundary conditions in a closed-open tube?
a) There are nodes at both the closed and open ends.
b) There are antinodes at both the closed and open ends.
c) There is an antinode at the closed end and a node at the open end.
d) There is a node at the closed end and an antinode at the open end.
d) There is a node at the closed end and an antinode at the open end.
Mary has a tube that is 6 cm long. When she blew air over the top on one end while closing the other, she found that the lowest note that sustained in the tube had a frequency of 1400 Hz. What would be the frequency of the second standing wave for the tube?
a) 2100 Hz
b) 4200 Hz
c) 700 Hz
d) 2800 Hz
b) 4200 Hz
