sound signal generation by analysis of narrow band
TRANSCRIPT
Outline
0 Background
0 Motivation and Problem Statement
0 Related Work
0 Research Processes
0 Results
0 Analysis of sound signal
0 Generation of sound signal
0 Summary
Motivation and Problem Statement
0 An environmental sound is necessity in many fields.
0 However, these creating methods require too much cost, time and labor.
To reduce the cost, the time, and the labor.
0 A new method of environmental sound generation is required.
Purpose:
To find important factors of sound generation.
Related Work
0We consolidate one of analytical approach.(GT2011 Inoue)
Research Processes
0 We do processing of filter bank for sound signal.
0 We require phase and amplitude of analytical signal every band.
0 We generate sound using sine-wave model.
Analysis: Filter bank processing
0 Sound source : Impact to a glass bottle by a wood stick.
0 The sound signals are divided into narrow frequency bands using filter bank.
0 Band-pass filter is used.
0 Bandwidth is 100Hz.
Analysis: Confined Component
0 Using bands
0 37, 38, 39, 65 and 66 bands in 240 bands
Glass-Amplitude
8/9
Analysis: Regularity of Phase
Glass-Phase
Generation: Fundamental tone and Determinate Sound
10/9
Generation: Generative Sound
0 ①:Fundamental Tone
0 ②:Determinate of 5 Component Sounds
0 ③:Straight-line Approximation 5 Component Sounds and Initial Phase of 0
0 ④:Straight-line Approximation 5 Component Soundsand Initial Phase of Random
① ② ③ ④
Summary
0 We generate sound by 5 component sounds.
0 However, initial phase of 0 and random sound is difference in former determinate of 5 component sounds.
0 We can’t pick out regularity about phase.
Thank you
APPENDIX
Generation : Sine-wave model
0 We generated the sound using sine-wave model.
0 It is difficult to make the amplitudes and the phases without using the information of the original sound.
0 We will approximate the original amplitudes and phasesin order to discover what values can influence the generated sound.
Therefore
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Sound source
0 Materials
0 Glass bottle
0 Wood stick