Subject: Re: speech onset and offset From: Prof Leslie Smith <l.s.smith@xxxxxxxx> Date: Sun, 17 May 2009 14:35:29 +0100 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Dear Tianshu: This will depend on precisely what you mean: do you mean the onset and offset time as measured exactly at the speaker's mouth (or in an anechoic chamber), or the onset and offset time as measured in a realistic room some distance from the speaker? For the former, I don't know the answer (but suspect both are similar: a voiced sound cut of by closing the lips will stop pretty quickly). For the room, the onset comes from the direct path (since this is generally speaking, the shortest path), so that the actual onset time is unaffected by the echoes in the room (actually, it will continue to strengthen afterwards, as the energy from the echoes arrives at the microphone), but the offset time will be strongly affected by the reverberation: It will be much longer. --Leslie Smith On Sun, May 17, 2009 12:38 pm, Tianshu qu wrote: > Dear list, > I have heard a word that the rising time of speech syllable's onset is > more > rapidly than the drop time of offset. I want to know whether it is > correct. > And, does anyone know some paper on it. Thanks. > Best Regards > Tianshu Qu > -- Prof Leslie Smith Head, Department of Computing Science and Mathematics University of Stirling, Stirling FK9 4LA Scotland Tel (44) 1786 467435 -- Academic Excellence at the Heart of Scotland. The University of Stirling is a charity registered in Scotland, number SC 011159.