Subject: Re: sound events database From: Brian Gygi <bgygi@xxxxxxxx> Date: Thu, 22 Apr 2010 22:07:24 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>----=_vm_0011_W7331128586_20882_1271974044 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ernesto ( and all) Some colleagues and I are in the process of putting our database of envir= onmental sounds online in a searchable format. The address is desra.org. = It is still in the developmental stages, but you will able to search for = a different types of sounds and get a variety of information about those = sounds. If you trouble finding what you need there, you can contact me directly a= nd I can see what I have that might suit you. As for the specific data regarding the recording conditions, it is extrem= ely rare to get that information about sounds collected secondhand . We h= ired a professional recordist to get some sounds and mandated that he not= e the recording distance, which he did reluctantly (we also wanted him to= use a calibration tone, which he did not do) so some sounds have that no= ted. Although knowing the recording level and distance can help to recapt= ure the initial listening conditions, it is not necessary if one is just = looking for identifiable tokens, since identifiability is quite robust to= distance from the source. Brian Gygi, Ph.D. Speech and Hearing Research Veterans Affairs Northern California Health Care System 150 Muir Road Martinez, CA 94553 (925) 372-2000 x5653 -----Original Message----- From: Ernesto Accolti [mailto:ernestoaccolti@xxxxxxxx Sent: Thursday, April 22, 2010 07:33 AM To: AUDITORY@xxxxxxxx Subject: Re: sound events database Dear Neil.You are right. Both, the sound events database and an SPL at kn= owndistances database can be sufficient. However I'm not sure if it iseas= y to access to this two databases and adapt each data or makingmyself the= (calibrated) recordings.I think that I will need more than 100 sound eve= nts.How did you solved the problem of the ground traffic? Did you had tom= easure yourself the typical SPL at known distances?Thanks!Ernesto.2010/4/= 22 Neil Waterman :> Surely what you really need is a database of typical = SPL levels for certain> sound sources at known distances?> I work for a c= ompany producing Level D certifiable sound systems for use in> the highes= t fidelity sound systems, and reproduction must EXACTLY match the> source= aircraft, but once you accept general sounds (as opposed to SPECIFIC> on= es) there is no reference SPL only representative levels - I face this> p= roblem when representing the ground traffic around the aircraft while on>= the ground (push-back trucks, luggage carts, etc)> - Neil ----=_vm_0011_W7331128586_20882_1271974044 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html><div><span class=3D"Apple-style-span" style=3D"font-size: small;"><= br></span></div><div><font face=3D"Verdana" size=3D"2">Ernesto ( and all)= </font></div><div><span class=3D"Apple-style-span" style=3D"font-size: sm= all;"><br></span></div><div><font face=3D"Verdana" size=3D"2">Some collea= gues and I are in the process of putting our database of environmental so= unds online in a searchable format. The address is desra.org.  = ;It is still in the developmental stages, but you will able to search for= a different types of sounds and get a variety of information about those= sounds. </font></div><div><span class=3D"Apple-style-span" style=3D= "font-size: small;"><br></span></div><div><span class=3D"Apple-style-span= " style=3D"font-size: small;">If you trouble finding what you need there,= you can contact me directly and I can see what I have that might suit yo= u.</span></div><div><span class=3D"Apple-style-span" style=3D"font-size: = small;"><br></span></div><div><font face=3D"Verdana" size=3D"2">As for th= e specific data regarding the recording conditions, it is extremely rare = to get that information about sounds collected secondhand . W= e hired a professional recordist to get some sounds and mandated that he = note the recording distance, which he did reluctantly (we also wanted him= to use a calibration tone, which he did not do) so some sounds have that= noted. Although knowing the recording level and distance can help = to recapture the initial listening conditions, it is not necessary if one= is just looking for identifiable tokens, since identifiability is quite = robust to distance from the source.</font></div><div><font face=3D"Verdan= a" size=3D"2"> </font></div>Brian Gygi, Ph.D.<br>Speech and Hearing = Research<br>Veterans Affairs Northern California Health Care System<br>15= 0 Muir Road<br>Martinez, CA 94553<br>(925) 372-2000 x5653<div><font face=3D= "Verdana" color=3D"#0000ff" size=3D"2"></font> </div><blockquote sty= le=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid= ; MARGIN-RIGHT: 0px"><font face=3D"Tahoma" size=3D"2">-----Original Messa= ge-----<br><b>From:</b> Ernesto Accolti [mailto:ernestoaccolti@xxxxxxxx= <br><b>Sent:</b> Thursday, April 22, 2010 07:33 AM<br><b>To:</b> AUDITORY= @xxxxxxxx<br><b>Subject:</b> Re: sound events database<br><br></fo= nt>Dear Neil.You are right. Both, the sound events database and an SPL at= knowndistances database can be sufficient. However I'm not sure if it is= easy to access to this two databases and adapt each data or makingmyself = the (calibrated) recordings.I think that I will need more than 100 sound = events.How did you solved the problem of the ground traffic? Did you had = tomeasure yourself the typical SPL at known distances?Thanks!Ernesto.2010= /4/22 Neil Waterman <neil.waterman@xxxxxxxx>:> Surely what you rea= lly need is a database of typical SPL levels for certain> sound source= s at known distances?> I work for a company producing Level D certifia= ble sound systems for use in> the highest fidelity sound systems, and = reproduction must EXACTLY match the> source aircraft, but once you acc= ept general sounds (as opposed to SPECIFIC> ones) there is no referenc= e SPL only representative levels - I face this> problem when represent= ing the ground traffic around the aircraft while on> the ground (push-= back trucks, luggage carts, etc)> - Neil</neil.waterman@xxxxxxxx><= /blockquote></html> ----=_vm_0011_W7331128586_20882_1271974044--