Chapter 3 Flashcards
(9 cards)
Time series:
A set of paired variables, one of which is
some recorded observations and the other of which is the times (or sometimes just the order) in which the observations are recorded number of letters in the spelled form of a word in preserved texts over the years or centuries since the word was first seen in writing, the amplitude of air pressure fluctuation recorded at regular intervals over the milliseconds (or seconds, or minutes) of an audio recording
Time plot:
A picture of a sample of time series data,
where time is plotted along one axis (typically the xaxis) and the paired observations are plotted along the
other axis. Example: a waveform of an audio recording,
bin size:
The size of the range of numerical values included in each bin,represented by each bar, of a histogram.
stressed form:
The longer, less ambiguous variant of a word or phrase, usually introducing new information, or an unfamiliar word.
unstressed form:
The more predictable variant of a word or phrase, that is usually less carefully pronounced.
reduced form:
The more predictable variant of a word or phrase, that is usually less carefully pronounced
sampling rate (sampling frequency):
The number of samples taken per specified unit of time, usually to convert a continuous stream, such as sound, into smaller measured units. Example: music CDs are usually recorded at a rate of44,100 samples per second
sampling period:
The interval between successive samples. Example: the sampling period for a music CD is
usually about 0.0002 seconds (i.e., 1/44100).
sound waveform: Time plot of the amplitude
hertz (Hz):
A unit of measurement that means repetitions
per second. Used to measure frequency of many things,including sampling frequency, pitch, vowel formants, etc.Example: The typical sampling rate for a music CD is 44,000
Hz.
