Sound signal generation by analysis of narrow band

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

15/16

Sound source

0 Materials

0 Glass bottle

0 Wood stick