Exam (elaborations)
ComD 5070 Exam 1 Acoustic Analysis Solved 100% Correct
- Course
- Institution
ComD 5070 Exam 1 Acoustic Analysis Solved 100% Correct
[Show more]
Content preview
ComD 5070 Exam 1 Acoustic AnalysisSolved 100% Correct
A 45 Hz bandwidth would be considered to be _______ __________. - ANSWER-
Narrow Bandwidth
A wide-band spectrogram is how many Hz? - ANSWER-300 Hz
All sounds originate with __________. - ANSWER-- MOVEMENT
- VIBRATION of air molecules
Characteristics of a wide-bandwidth. - ANSWER-- VERTICAL striations are GLOTTAL
PULSES
- ACCURATE TIME measures
Characteristics of narrow- bandwidth. - ANSWER-- HORIZONTAL bands are
HARMONICS
- TIME measures are NOT accurate
Describe a graphical representation of a nearly periodic sound. - ANSWER-- spectrum
does not have "pure" lines
- there are some peaks but there is some spread around the base of the peaks (which
represents the imperfection/NOISE that is present in EVERY human voice
FOURIER TRANSFORM - ANSWER-- take a time domain wave form (such as a mic
sig.)
- analyze it in such a way to create a spectrum which shows what the individual
components are
- analogy: take white light and put in through a prism and seeing the different colors that
come out
- going from one view of a signal to another view
Give 3 examples of vibration from different sound sources. - ANSWER-1) VIBRATING
string of an instrument
2) OSCILLATION of the vocal cords
3) TURBULENCE in air molecules leaving a tire
Harmonic Series: - ANSWER-- harmonics are MULTIPLES of the FUNDAMENTAL
- each line represents the harmonic frequencies
- has nothing between the lines (NO ENERGY BETWEEN the components)
If it is not harmonic in the voice, then it is ______. - ANSWER-NOISE
, If the ARTICULATION is disordered then we know something is wrong with the ______
________ __________, necessitating a change in __________. - ANSWER--
MOVEMENT OF THE ARTICULATORS
- FILTER
If the VOICE is disordered then we know something is wrong with the ______ ________
__________, necessitating a change in __________. - ANSWER-- VOCAL FOLD
MOVEMENT
- SOURCE
LINE SPECTRUM: - ANSWER-- SNAPSHOT in time
SOURCE/FILTER THEORY OF SPEECH basic principle: - ANSWER-- SOURCE refers
to the VOICE (sound coming out of the larynx from the vocal folds
- FILTER refers to what the vocal fold does to SHAPE the SOUNDS that the larynx
sends into it (ARTICULATION)
SPECTROGRAM - ANSWER-- show speech OVER TIME (progression)
- shows individual spectral slices that are arranged side by side overtime
- they can show us how the frequency components can change overtime
- very useful because speech is rapid succession with whole series of spectral
characteristics
Spectrograms are created from ______ ________. - ANSWER-Digital Recordings
T/F. A Speech Spectrogram is both a Time Domain Display and a Frequency Domain
Display. - ANSWER-TRUE.
- it is a COMBINATION of both
- it shows how the STRENGTH in each FREQUENCY in CHANGING over TIME
T/F. A SPEECH WAVE is similar to a simple SINE WAVE. - ANSWER-FALSE.
- speech waves are EXTREMELY COMPLEX because there are so many structures
that contribute to the sound
T/F. Acoustic Analysis can tell us everything about vocal tract movements. - ANSWER-
FALSE
- There are LIMITATIONS
- it is useful but it doesn't perfectly reflect a linear 1:1 way the precise movements that
went into making that sound
T/F. If your sample rate is TOO LOW you can always "up-sample" later. - ANSWER-
FALSE.
- there is no way to "up-sample because you CAN'T REPLACE info that wasn't in the
original recording.
T/F. The human voice is nearly periodic. - ANSWER-TRUE.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller LUCKYSTAR2022. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62890 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
