Improvement of speech signals in public spaces: Acoustic design from a viewpoint to optimize perceptual interactions

2017 Fiscal Year Final Research Report

• Project/Area Number: 25242002
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Design science
• Research Institution: Kyushu University
• Principal Investigator: Nakajima Yoshitaka 九州大学, 芸術工学研究院, 教授 (90127267)
• Co-Investigator(Kenkyū-buntansha): 飛松 省三 九州大学, 医学研究院, 教授 (40164008) ; 松尾 行雄 東北学院大学, 教養学部, 教授 (40323117) ; Remijn GerardB. 九州大学, 芸術工学研究院, 准教授 (40467098) ; 上田 和夫 九州大学, 芸術工学研究院, 准教授 (80254316)
• Project Period (FY): 2013-04-01 – 2018-03-31
• Keywords: 音声強調 / 音声情報圧縮 / モザイク音声 / 時間分解能 / 多変量解析 / 音韻論 / 脳波 / 鳴音性

Outline of Final Research Achievements

Conventional technologies related to speech transmission are often based on crude impressions of speech announcements or environments. However, the most important thing about speech announcements is whether the contents are conveyed correctly, and it is desired to develop speech signals resilient against noise and reverberation. We performed basic and applied studies from the viewpoints of auditory psychology, speech science, and neurophysiology. Our multivariate analyses revealed that four factors are sufficient to express essential spectral fluctuations of speech: Noise-vocoded speech resynthesized from the four factors was highly intelligible. One of the factors related to a frequency range around 600-1700 Hz corresponded to what is called ‘sonority’ in phonology.

Free Research Field

聴覚心理学