聴覚の周縁系のスペクトル表現は 低音の音を遮る音声の下での 音声生成の変化を説明できるのか?
Yasufumi Uezu1, Masato Akagi1, Masashi Unoki1
1Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
The Journal of the Acoustical Society of America
|September 3, 2025
まとめ
聴覚的スペクトル表現は,マスク効果を明らかにすることによって,ノイズが母音生成にどのように影響するか説明します. これらの効果は 補償的な言語調整を誘発し 聴覚運動制御モデルをサポートします
科学分野:
- スピーチ・プロダクション
- 聴覚的知覚
- アコースティック・フォネティック
背景:
- 音声の生成は背景の騒音によって影響を受け,特に下位音が隠されている場合です.
- 聴覚系が 不利な環境下での発話に 果たす役割を理解することは 極めて重要です
研究 の 目的:
- 音声スペクトル表現が様々な騒音条件下での母音生成の変化をどのように説明するかを調査する.
- 聴覚マスクが発声周波数と声の強度に与える影響を測定する.
主な方法:
- 10人の成人の男性日本語話者は静かで騒々しい環境で /a/ と /i/ を持続的に発音した.
- 騒音条件には,75 dBのブロードバンド,低通路,および高通路の騒音が含まれています.
- 声の強度,音源の幅度/周波数,そして聴覚スペクトル表現 (高音モデルを用いて) を分析した.
主要な成果:
- 騒々しい環境では,一般的に声の強さと発声幅が増加します.
- 第"形式 (F1) の周波数は,ブロードバンドノイズによって上位にシフトし,第2形式 (F2) の周波数は,母音とノイズタイプによって変化する.
- 聴覚刺激パターンの重なりによって示される周波数特有のマスク効果は,電力スペクトルよりも生産の変化をよく説明します.
結論:
- 聴覚マスクは音声の周波数と強度を変えることで 音声の発声に影響を及ぼします
- 聴覚運動制御の知覚的に接地されたモデルは,騒々しい環境でのこれらの発見によって支持されています.
- 音声スペクトル表現は,音声への言語調整の仕組みを洞察します.
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