<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.6001.18148" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY style="WORD-WRAP: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space" bgColor=#ffffff> <DIV><FONT face=Arial size=2>Fred-</FONT></DIV> <DIV><FONT face=Arial size=2>These are "medical" tuning forks, used to test hearing. Some doctors still use them for a quick assessment of hearing. There were several interesting techniques for hearing tests, such as "Hold the fork to the top of the skull and have the patient report if it sounds louder in one ear."</FONT></DIV> <DIV><FONT face=Arial size=2>Ed S.</FONT></DIV> <DIV> </DIV> <DIV> </DIV> <DIV>----- Original Message ----- </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=fssturm@unm.edu href="mailto:fssturm@unm.edu">Fred Sturm</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=caut@ptg.org href="mailto:caut@ptg.org">caut University Technicians</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, October 28, 2008 11:25 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> [CAUT] set of C forks</DIV> <DIV><BR></DIV> <DIV>Hi all,</DIV> <DIV><SPAN class=Apple-tab-span style="WHITE-SPACE: pre"></SPAN>I found this set of C forks next to the piano in a customer's house today. Rather a curiosity. C3, C4, C5, C6 and C7. The big one in the middle is C7, the thin one on the bottom is C3. They are not quite standard pitch (either 435 or 440), but rather that "powers of 2" series of frequencies: 128, 256, 512, 1024, and 2048 (numbers stamped on each fork). The owner knew nothing about them. I suspect they might have been intended for other than tuning (hearing tests?), but really have no idea. Maybe someone on the list knows something. Anyhow, something curious.<BR></DIV> <DIV><BR></DIV> <DIV><IMG height=240 src="cid:9C257884A9894669A0C6DDC2FFC16BAE@EdPC" width=324 apple-height="yes" apple-width="yes"> <DIV style="MIN-HEIGHT: 14px; MARGIN: 0px; FONT: 12px Helvetica"><BR></DIV> <DIV style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica size=3>100_0998.JPG</FONT></DIV> <P style="MIN-HEIGHT: 14px; MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica size=3><SPAN class=Apple-converted-space></SPAN></FONT><BR class=webkit-block-placeholder> </P> <DIV style="MIN-HEIGHT: 14px; MARGIN: 0px; FONT: 12px Helvetica"><BR></DIV></DIV><BR><BR> <DIV apple-content-edited="true"><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; orphans: 2; widows: 2; -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: 0"> <DIV style="WORD-WRAP: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space"> <DIV>Regards,</DIV> <DIV>Fred Sturm</DIV> <DIV>University of New Mexico</DIV> <DIV><A href="mailto:fssturm@unm.edu">fssturm@unm.edu</A></DIV> <DIV><BR class=webkit-block-placeholder></DIV></DIV></SPAN><BR class=Apple-interchange-newline></DIV><BR></BLOCKQUOTE></BODY></HTML>