Re: [AUDITORY] loudspeaker recommendations (Davies Bill )

Subject: Re: [AUDITORY] loudspeaker recommendations From: Davies Bill <W.Davies@xxxxxxxx> Date: Thu, 9 Mar 2017 18:47:21 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY> --_000_51F6FD61D5B32B4083EDAFE1D3F35880A37276C9uospexch02_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Maria et al., At Salford, most of our expts with loudspeakers use Genelec powered monitor= s, including most listening tests with complex stimuli, though this is part= ly because we have a lot of links with the manufacturer. Any small monitor = intended for professional recording studios would probably be adequate. I'm making assumptions from your brief notes, but I think the main problems= will not come from phase alignment between two drivers or from being close= r than the 1 m the manufacturer will have measured the frequency response a= t. I'm more interested in spatial effects. The size and surface treatment o= f the room may have a significant effect, depending on what you are reprodu= cing. A lot of our listening tests with loudspeakers are performed in a roo= m conforming to ITU-R BS.1116-1 (signals to reviewers that we got the effec= t of the room to be about as small as it can be while still sounding 'natur= al'). That said, we have recently been doing work with an object-based audi= o system in a much smaller room, though, with reasonable results. I'm also a bit curious about why you're using mono reproduction of "spectra= lly rich soundscapes". This sort of stimulus is usually reproduced over som= e kind of spatialized system. 2D or 3D ambisonic or head-tracked binaural s= eem popular these days. Best, Professor Bill Davies Acoustics Research Centre Associate Dean Academic | School of Computing, Science and Engineering Room 108, Newton Building, University of Salford, Salford M5 4WT t: +44 (0) 161 295 5986 w.davies@xxxxxxxx<mailto:w.davies@xxxxxxxx> | www.salford.ac.uk<= http://www.salford.ac.uk/> From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= ILL.CA] On Behalf Of Chait, Maria Sent: 07 March 2017 22:26 To: AUDITORY@xxxxxxxx Subject: [AUDITORY] loudspeaker recommendations Dear Colleagues, So far we have been conducting our behavioural experiments using high quali= ty headphones, but for various reasons will need to shift to using free fie= ld sound presentation for some of our work. I was hoping you might be able= to recommend a high quality loud speaker to use for this purpose; Ideally,= one that we can purchase easily from the UK. Our requirements: Experiments are conducted in a small-ish sound-proof boo= th, and we plan to position a single loudspeaker about 50-70 cm in front of= the listener (space constraints prevents this from being any further away)= . Stimuli are spectrally rich 'soundscapes'. My understanding is that we should prefer single cone speakers? Many thanks, Maria Maria Chait PhD m.chait@xxxxxxxx<mailto:m.chait@xxxxxxxx> Reader in Auditory Cognitive Neuroscience Lab site: http://www.ucl.ac.uk/ear/research/chaitlab/ UCL Ear Institute 332 Gray's Inn Road London WC1X 8EE --_000_51F6FD61D5B32B4083EDAFE1D3F35880A37276C9uospexch02_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <meta name=3D"Generator" content=3D"Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> Hi Maria et al.,<o:p><= /o:p> <o:p> </o:p></spa= n> At Salford, most of ou= r expts with loudspeakers use Genelec powered monitors, including most list= ening tests with complex stimuli, though this is partly because we have a l= ot of links with the manufacturer. Any small monitor intended for professional recording studios would probably b= e adequate.<o:p></o:p> <o:p> </o:p></spa= n> I’m making assum= ptions from your brief notes, but I think the main problems will not come f= rom phase alignment between two drivers or from being closer than the 1 m t= he manufacturer will have measured the frequency response at. I’m more interested in spatial effects. The size and su= rface treatment of the room may have a significant effect, depending on wha= t you are reproducing. A lot of our listening tests with loudspeakers are p= erformed in a room conforming to ITU-R BS.1116-1 (signals to reviewers that we got the effect of the room to be a= bout as small as it can be while still sounding ‘natural’). Tha= t said, we have recently been doing work with an object-based audio system = in a much smaller room, though, with reasonable results.<o:p></o:p> <o:p> </o:p></spa= n> I’m also a bit c= urious about why you’re using mono reproduction of “spectrally = rich soundscapes”. This sort of stimulus is usually reproduced over s= ome kind of spatialized system. 2D or 3D ambisonic or head-tracked binaural seem popular these days.<o:p></o:p> <o:p> </o:p></spa= n> Best,<o:p></o:p></span= > <div>  <o:p></o:p> Professor Bill Davies<o:p></o:p> Acoustics Research Centre<o:p></o:p></= p> Associate Dean Academic  |  = School of Computing, Science and Engineering<o:p></o:p> Room 108, Newton Building, University of Salf= ord, Salford  M5 4WT<o:p></o:p> t: +44 (0) 161 295 5986<o:p></o:p> <a href=3D"mailto:w.davies@xxxxxxxx" tar= get=3D"_blank">w.davies@xxxxxxxx</a>  | <a href=3D"= http://www.salford.ac.uk/" target=3D"_blank">www.salford.ac.uk</a><o:p></o:p>  <o:p></o:p>  <o:p></o:p> </div> <o:p> </o:p></spa= n> <div> <div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm = 0cm 0cm"> From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= MCGILL.CA] On Behalf Of Chait, Maria Sent: 07 March 2017 22:26 To: AUDITORY@xxxxxxxx Subject: [AUDITORY] loudspeaker recommendations<o:p></o:p></p= > </div> </div> <o:p> </o:p> Dear Colleagues,<o:p></o:p> So far we have been conducting our behavioural exper= iments using high quality headphones, but for various reasons will need to = shift to using free field sound presentation for some of our work.  I = was hoping you might be able to recommend a high quality loud speaker to use for this purpose; Ideally, one that we = can purchase easily from the UK. <o:p></o:p> <o:p> </o:p> Our requirements:  Experiments are conducted in= a small-ish sound-proof booth, and we plan to position a single loudspeake= r about 50-70 cm in front of the listener (space constraints prevents this = from being any further away). Stimuli are spectrally rich ‘soundscapes’.  <o:p></o:p> My understanding is that we should prefer single con= e speakers?<o:p></o:p> <o:p> </o:p> Many thanks,<o:p></o:p> Maria<o:p></o:p> <o:p> </o:p> <o:p> </o:p> Maria Chait PhD<o:p></o:p> <a href=3D"mailto:m.chait@xxxxxxxx">m.chait@xxxxxxxx= uk</a><o:p></o:p> Reader in Auditory Cognitive Neuroscience <o:p></o:p= > Lab site: <a href=3D"http://www.ucl.ac.uk/ear/r= esearch/chaitlab/">http://www.ucl.ac.uk/ear/research/chaitlab/</a><o:p></o:= p> UCL Ear Institute<o:p></o:p> 332 Gray's Inn Road<o:p></o:p> London WC1X 8EE<o:p></o:p> <o:p> </o:p> </div> </body> </html> --_000_51F6FD61D5B32B4083EDAFE1D3F35880A37276C9uospexch02_--

This message came from the mail archive
../postings/2017/
maintained by:

DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University