Quiz 2 Flashcards
Which bridge is famous because of a problem with standing waves?
The Takoma bridge
What is the movement of medium in standing waves like?
there can be many points where there is no movement of the medium
What is initially displayed with recorded sound in Audacity?
The time domain
What is displayed when a region is selected and a plot spectrum is applied?
the frequency domain
What does ADSR stand for?
attack, decay, sustain, release
If the fundamental frequency of a string is 100 Hz, what will be the frequency of the second harmonic?
200 Hz
Why does a note from an instrument sound different when recorded and played backwards?
the envelope has a completely different profile when reversed in time
If the string length on a guitar is 0.6m, what are the wavelengths of the fundamental and 3rd harmonic?
1.2m and 0.4m
What is the project rate (hz) in Audacity a measure of?
the number of sound samples per second
What properties are related to standing waves?
frequency, wavelength and speed
Why does the spectrum of a musical note in Audacity consist of broad peaks, as opposed to sharp spikes?
the spectrum is an approximation based on analysis with some simple assumptions which are not quite true
What does the sound from a musical instrument show up as in the spectrum window of audacity?
a strong peak at the fundamental with weaker peaks showing the harmonics
What is the timbre a combination of?
harmonic spectrum and envelope
