exercise 2 Vocal individuality

Question 1

Aim

Answer 1

Find out which vocal parameters encode information about individual identity in humans

Learn methods for recording sounds, analyzing sounds, and performing statistical analyses to highlight vocal identity

Question 2

Sound

Answer 2

Vibration of particles that propagate as a mechanical wave of pressure and displacement, through a medium such as water or air

Question 3

Recording and vocal analysis

Answer 3

1) Record own voice saying ‘ba-ba-ba-ba’ 5 times

2) Use Praat siftware to extract our 20 ‘ba’ sounds

3) Use the Praat script to analyse the sounds - Linear Discriminant Analysis

Question 4

Linear Discriminant Analysis

Answer 4

Group data based on vocal individuality

Question 5

Results

Answer 5

We found that the voices differ significantly.

Male students had lower F0 values - suggesting that males and females differ in formant frequencies

The higher and lower pitch could be used to classify the sexes in our experiment

Question 6

Source-filter theory

Answer 6

vocal production in 2 steps.

1) The source - the air flows from the lungs through the larynx to generate vibrations of the vocal folds

2) The filter - vocal tract later filters the source sound, by selectively amplifying frequency components and diminishing others