Lab report

The purpose of the experiment is to utilize Praat in order to measure certain characteristics of vocal utterance. The measurement will be made some from the wave from and the others from using the FFT power spectrum.

Praat was used as an equipment to measure certain features of the vocal utterance for this lab. We used ten stimuli files in total and used Praat to read the file.
Table 1. Measurement of T in seconds and f0 in Hz for selected vowels
File Name Vowel Identity T
Waveform f0 Waveform
f0 Spectrum T Spectrum
PB1 i 0.0092 108.69 105.97 0.0094
PB2 ? 0.01 95.57 99.26 0.001
PB3 ? 0.0099 100.85 105.97 0.0094
PB4 æ 0.011 90.90 92.56 0.011
PB5 ? 0.01 94.80 92.56 0.011
PB6 ? 0.0099 100.35 99.26 0.01
PB7 o 0.01 100 92.52 0.01
PB8 ? 0.01 100 99.26 0.01
PB9 u 0.0090 111.11 112.68 0.0088

Above table shows the phonetic structure of each stimuli according to the numbers of the stimuli.
The speech file was all recorded by male.

– Phoneme: the smallest unit of speech sound
– Frequency and Period: the inverse of each other.
– Waveform and Spectrum: both shared some features of acoustics, each has its own strength that the other does not have.
Identify the Vowel in /hVd/ Stimuli
•Given a plot of waveform, how could you tell which portion is vowel?
1.Vowels have _____ sound power/intensity than consonants
2.What is another ways to tell the vowel portion?
•What are 2 overarching types of waveforms?
•And What are 2 subtypes of complex waveforms?

Did you get the same value of Period from both waveform and spectrum measurements?
• Did you get the same value of Fundamental Frequency from both waveform and spectrum measurements?
•Why or why not different?
•Human judgments
•Cursor step size (smallest cursor movement)
•Bandwidth of each spike on FFT spectrum






Sample Solution