2. Outline
0 Background
0 Motivation and Problem Statement
0 Research Processes
0 Results
0 Analysis of sound signal
0 Generation of sound signal
0 Summary

3. 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.

4. 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.

5. 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.

6. Analysis: Confined Component
0 Using bands
0 37, 38, 39, 65 and 66 bands in 240 bands
Glass-Amplitude

7. Generation: Generative Sound
① ② ③ ④
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 Sounds
and Initial Phase of Random
7/9

8. 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.