Effective and low-noise masking technique by use with active noise control

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289051
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: Kyushu University
• Principal Investigator: KIJIMOTO Shinya 九州大学, 工学(系)研究科(研究院), 教授 (30204861)
• Co-Investigator(Renkei-kenkyūsha): ISHIKAWA Satoshi 九州大学, 大学院工学研究院, 准教授 (60612124) ; KOBA Yosuke 九州大学, 工学部, 技術専門職員 (20380602)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 音声マスキング / 能動音響制御

Outline of Final Research Achievements

There are several situations that the conversation sound which contains personal information or a confidential information can be heard unintentionally by a third-party . In this research, novel approaches about masking using active noise control technique are proposed. These approaches make one's recognition difficult with changing the frequency characteristics of the target sound adaptively and/or selectively. It was confirmed that Japanese vowels can be masked effectively with the proposed band-noise. In addition, the effectiveness of the proposed method using active noise control was also confirmed. We compared the conventional masking sound performance and made the condition of an ideal masking sound clear.

Free Research Field

能動音響制御