Sound, vibrations, frequency and period Flashcards
(22 cards)
What is a waveform?
Sound moves in air as a vibration causing a disturbance in air particles a waveform is a graphical representation of this variation in air pressure.
True or False: A sine wave is the simplest form of waveform.
True
Fill in the blank: The ________ of a waveform refers to the number of cycles it completes in one second.
frequency
What unit is frequency measured in?
Hertz (Hz)
What is the period of a waveform?
The period is the duration of one cycle of the waveform.
Which waveform is characterized by sharp edges and sudden changes?
Square wave
True or False: A triangle wave contains only odd harmonics.
False
What is an envelope in the context of sound waveforms?
An envelope describes how a sound’s amplitude changes over time, typically characterized by attack, decay, sustain, and release (ADSR).
Multiple Choice: Which of the following is NOT a type of waveform? A) Sine B) Square C) Triangle D) Circle
D) Circle
What is the phase of a waveform?
The phase indicates the position of a point in time on a waveform cycle and is measured in degrees from 0-360.
What is aliasing in digital audio?
Aliasing occurs when high-frequency signals are sampled at a rate too low to accurately represent them, causing distortion.
True or False: The amplitude of a waveform determines its loudness.
True
What does the term ‘harmonic’ refer to in waveforms?
Harmonics are multiples of a fundamental frequency that contribute to the timbre of a sound.
Multiple Choice: Which waveform is often used in synthesizers for a smooth sound? A) Square B) Sine C) Sawtooth D) All of the above
B) Sine
What is the difference between digital and analog waveforms?
Analog waveforms are continuous signals, while digital waveforms are discrete and represented by binary values.
Fill in the blank: The ________ of a waveform affects its perceived tone quality.
harmonics
What is the significance of the Nyquist theorem in waveform sampling?
The Nyquist theorem states that to accurately sample a waveform, it must be sampled at least twice its highest frequency.
True or False: A sawtooth wave has a gradual rise and a sharp drop.
True
What is the equation for Time?
Time = 1/Frequency
True or False: Period is written as P.
False, period is written as a T and is the time in seconds that it takes for one complete wave cycle.
What are the 2 axis’ measuring on a waveform graph?
Amplitude (Y-axis) & Time (X-axis)
The ________ is the amount of displacement from the 0 line.
Amplitude
