Subject: Re: Term for 'window of integration' From: Kevin Austin <kevin.austin@xxxxxxxx> Date: Wed, 3 Dec 2008 13:56:48 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--Boundary_(ID_E/tXBRiXQNFhITo7500H1Q) Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-transfer-encoding: 7BIT Thank you. I like the term: "critical flicker fusion rate (CFF)" from the Wiki entry. I too suspect that this varies for auditory stimulus, partly because of streaming, and partly also because it is possible to have the same rate of stimulus with different results. Consider a 60Hz pulse wave (16.6 ms) played over a 12 channel sound system where each loudspeaker receives a pulse every 200 ms, delayed by 16.6 ms. From any one loudspeaker there is a 5 Hz pulse stream; from any two adjacent speakers there is still a 5 Hz pulse stream, but the "pulse" is now a 'two pulse complex'. If these two speakers are facing my left ear, they will most likely fuse, but if I put my head between the speakers so that each ear (simply) receives the pulse from that speaker, what will my perception be? And expend this to 3, 4, 5 speakers ... at what point does the "n- pulse complex" cease to be a 5 Hz "tone", an fuse into a 60Hz tone. There is an area of sound art loosely called 'micro-montage' (or micro- editing) which plays in the area below 60 ms. Best Kevin On 2008, Dec 3, at 1:39 PM, Ross Deas wrote: > Hi, > > you probably already know this, but in the visual domain the term > for a rapidly oscillating visual stimulus that is perceived as > continuous is the "flicker fusion threshold" (wikipedia link below). > > http://en.wikipedia.org/wiki/Flicker_fusion_threshold > > It's well established within the visual domain - but I suspect that > it might vary for auditory stimuli. > > Hope this helps, > Ross Deas > > > On 3 Dec 2008, at 16:28, Kevin Austin wrote: > >> On another list, we are looking for the correct (scientific) term >> to describe the region between (about) 16 and 24 Hz where discrete >> events begin to be perceived as continuous events (in some >> circumstances), eg clicks to tones, continuous motion in film etc. >> >> Any assistance would be appreciated. >> >> Best >> Kevin > > Ross W. Deas > School of Psychology > University of Nottingham > University Park > Nottingham NG7 2RD --Boundary_(ID_E/tXBRiXQNFhITo7500H1Q) Content-type: text/html; charset=US-ASCII Content-transfer-encoding: quoted-printable <html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; "><div><br></div><div>Thank = you.</div><div><br></div><div>I like the term: "<span = class=3D"Apple-style-span" style=3D"line-height: 19px; ">critical = flicker fusion rate (CFF)" from the Wiki entry. I too suspect that this = varies for auditory stimulus, partly because of streaming, and partly = also because it is possible to have the same rate of stimulus with = different results.</span></div><div><span class=3D"Apple-style-span" = style=3D"line-height: 19px;"><br></span></div><div><span = class=3D"Apple-style-span" style=3D"line-height: 19px; ">Consider a 60Hz = pulse wave (16.6 ms) played over a 12 channel sound system where each = loudspeaker receives a pulse every 200 ms, delayed by 16.6 ms. =46rom= any one loudspeaker there is a 5 Hz pulse stream; from any two adjacent = speakers there is still a 5 Hz pulse stream, but the "pulse" is now a = 'two pulse complex'.</span></div><div><span class=3D"Apple-style-span" = style=3D"line-height: 19px;"><br></span></div><div><span = class=3D"Apple-style-span" style=3D"line-height: 19px; ">If these two = speakers are facing my left ear, they will most likely fuse, but if I = put my head between the speakers so that each ear (simply) receives the = pulse from that speaker, what will my perception be? And expend this to = 3, 4, 5 speakers ... at what point does the "n-pulse complex" cease to = be a 5 Hz "tone", an fuse into a 60Hz tone. There is an area of sound = art loosely called 'micro-montage' (or micro-editing) which plays in the = area below 60 ms.</span></div><div><span class=3D"Apple-style-span" = style=3D"line-height: 19px;"><br></span></div><div><span = class=3D"Apple-style-span" style=3D"line-height: = 19px;"><br></span></div><div><span class=3D"Apple-style-span" = style=3D"line-height: 19px;">Best</span></div><div><span = class=3D"Apple-style-span" style=3D"line-height: = 19px;"><br></span></div><div><span class=3D"Apple-style-span" = style=3D"line-height: = 19px;">Kevin</span></div><div><br></div><div><br></div><br><div><div>On = 2008, Dec 3, at 1:39 PM, Ross Deas wrote:</div><br = class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div = style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; "> = <div>Hi, </div><div><br></div><div>you probably already know this, = but in the visual domain the term for a rapidly oscillating visual = stimulus that is perceived as continuous is the "flicker fusion = threshold" (wikipedia link below).</div><div><br></div><a = href=3D"http://en.wikipedia.org/wiki/Flicker_fusion_threshold">http://en.w= ikipedia.org/wiki/Flicker_fusion_threshold</a><div><br></div><div>It's = well established within the visual domain - but I suspect that it might = vary for auditory stimuli.</div><div><br></div><div>Hope this = helps,</div><div>Ross Deas</div><div><br></div><div><br><div><div>On 3 = Dec 2008, at 16:28, Kevin Austin wrote:</div><br = class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div = style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = margin-left: 0px; ">On another list, we are looking for the correct = (scientific) term to describe the region between (about) 16 and 24 Hz = where discrete events begin to be perceived as continuous events (in = some circumstances), eg clicks to tones, continuous motion in film = etc.</div><div style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div = style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = margin-left: 0px; ">Any assistance would be appreciated.</div><div = style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; = margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: = 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; = ">Best</div><div style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; ">Kevin</div> = </blockquote></div><br><div> <span class=3D"Apple-style-span" = style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-style: = normal; font-variant: normal; font-weight: normal; letter-spacing: = normal; line-height: normal; orphans: 2; text-indent: 0px; = text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; = -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: = 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: = auto; -webkit-text-stroke-width: 0px; "><div><div style=3D"margin-top: = 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Ross W. = Deas</div><div style=3D"margin-top: 0px; margin-right: 0px; = margin-bottom: 0px; margin-left: 0px; "><font style=3D"font: normal = normal normal 12px/normal Helvetica; "><font class=3D"Apple-style-span" = face=3D"Courier" size=3D"4"><span class=3D"Apple-style-span" = style=3D"font-size: 14px;">School of = Psychology</span></font></font></div><div style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font = style=3D"font: normal normal normal 12px/normal Helvetica; "><font = class=3D"Apple-style-span" face=3D"Courier" size=3D"4"><span = class=3D"Apple-style-span" style=3D"font-size: 14px;">University of = Nottingham</span></font></font></div><div style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font = style=3D"font: normal normal normal 12px/normal Helvetica; "><font = class=3D"Apple-style-span" face=3D"Courier" size=3D"4"><span = class=3D"Apple-style-span" style=3D"font-size: 14px;">University = Park</span></font></font></div><div style=3D"margin-top: 0px; = margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font = style=3D"font: normal normal normal 12px/normal Helvetica; "><font = class=3D"Apple-style-span" face=3D"Courier" size=3D"4"><span = class=3D"Apple-style-span" style=3D"font-size: 14px;">Nottingham NG7 = 2RD</span></font></font></div></div></span></div></div></div></blockquote>= <div><br></div><div><br></div></div></body></html>= --Boundary_(ID_E/tXBRiXQNFhITo7500H1Q)--