Subject: Re: sound manipulations From: "Richard H." <auditory@xxxxxxxx> Date: Mon, 13 Feb 2006 20:21:59 -0000This is a multi-part message in MIME format. ------=_NextPart_000_00E8_01C630DB.24AA7600 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, What you are describing is NOT a hearing loss related problem - it is = called "occlusion". It is related to a hearing aid user having an occluded (blocked) ear = canal due to the presence of the hearing aid plastics. Low frequency sounds of the speaker's own voice and/or eating of food = (<500 Hz) travel via bone conduction and enter the cavity between the = hearing aid and eardrum. These trapped LF sounds cannot escape and so = can sound very loud to the hearing aid user. Note that this problem only happens if the hearing aid user has GOOD = hearing at the low frequencies! If the user has a hearing loss at low frequencies then this occlusion = effect is NOT noticed. This is simply a problem of hearing aid usage, not hearing loss. Some hearing aids (or earmoulds) have holes ("vents") drilled through = them to let this LF sound escape in an attempt to reduce the problem. However this can then increase this risk of feedback whistle. Modern "open fitting" hearing aids such as the GN Resound Air are = specially designed to overcome this problem. Perhaps increasing the gain of < 500Hz frequencies via an equaliser = would create the effect you seek? (Creating the effect of hearing loss is a different problem) regards, Richard ----- Original Message -----=20 From: Rene Gifford=20 To: AUDITORY@xxxxxxxx=20 Sent: Monday, February 13, 2006 6:21 PM Subject: sound manipulations Dear List, I am writing to request information on a type of software or available = program that allows for signal manipulations that may approximate = hearing impaired listeners' descriptions of speech. As you know, one = common complaint is that people sound as if they are speaking in a = barrel. Another is that the speaker sounds as if he has a bucket over = his head. Is anyone aware of such a program? =20 Sincerely, =20 Ren=E9 H. Gifford, Ph. D., CCC-A Postdoctoral Fellow Arizona State University Department of Speech and Hearing Science P. O. Box 870102 Tempe, AZ 85287-0102 =20 Phone: (480) 965-4954 Mail Code: 0102 =20 rgifford@xxxxxxxx =20 ------=_NextPart_000_00E8_01C630DB.24AA7600 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns=3D"http://www.w3.org/TR/REC-html40" xmlns:o =3D=20 "urn:schemas-microsoft-com:office:office" xmlns:w =3D=20 "urn:schemas-microsoft-com:office:word" xmlns:st1 =3D=20 "urn:schemas-microsoft-com:office:smarttags"><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2722" name=3DGENERATOR><o:SmartTagType = name=3D"PostalCode"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><o:SmartTagType=20 name=3D"State"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><o:SmartTagType=20 name=3D"City"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><o:SmartTagType=20 name=3D"Street"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><o:SmartTagType=20 name=3D"address"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><o:SmartTagType=20 name=3D"PlaceType"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><o:SmartTagType=20 name=3D"PlaceName"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><o:SmartTagType=20 name=3D"place"=20 namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"></o:SmartTagT= ype><!--[if !mso]> <STYLE>st1\:* { BEHAVIOR: url(#default#ieooui) } </STYLE> <![endif]--> <STYLE> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:Arial;} a:link, span.MsoHyperlink {color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:Arial; color:windowtext;} @xxxxxxxx Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in;} div.Section1 {page:Section1;} --> </STYLE> </HEAD> <BODY lang=3DEN-US vLink=3Dpurple link=3Dblue bgColor=3D#ffffff> <DIV><FONT face=3DArial>Hi,</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>What you are describing is NOT a hearing loss = related=20 problem - it is called "occlusion".</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>It is related to a hearing aid user having an = occluded=20 (blocked) ear canal due to the presence of the hearing aid=20 plastics.</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>Low frequency sounds of the speaker's own voice = and/or=20 eating of food (<500 Hz) travel via bone conduction and enter = the cavity=20 between the hearing aid and eardrum. These trapped LF sounds cannot = escape and=20 so can sound very loud to the hearing aid user.</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>Note that this problem only happens if the = hearing aid=20 user has GOOD hearing at the low frequencies!</FONT></DIV> <DIV><FONT face=3DArial>If the user has a hearing loss at low = frequencies then=20 this occlusion effect is NOT noticed.</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>This is simply a problem of hearing aid usage, = not hearing=20 loss.</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>Some hearing aids (or earmoulds) have holes = ("vents")=20 drilled through them to let this LF sound escape in an attempt to reduce = the=20 problem.</FONT></DIV> <DIV><FONT face=3DArial>However this can then increase this risk of = feedback=20 whistle.</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>Modern "open fitting" hearing aids such as the = GN Resound=20 Air are specially designed to overcome this problem.</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>Perhaps increasing the gain of < 500Hz = frequencies=20 via an equaliser would create the effect you seek?</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>(Creating the effect of hearing loss is a = different=20 problem)</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>regards,</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial>Richard</FONT></DIV> <DIV><FONT face=3DArial></FONT> </DIV> <DIV><FONT face=3DArial></FONT> </DIV> <BLOCKQUOTE dir=3Dltr=20 style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV> <DIV=20 style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B>=20 <A title=3DRene.Gifford@xxxxxxxx = href=3D"mailto:Rene.Gifford@xxxxxxxx">Rene=20 Gifford</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A = title=3DAUDITORY@xxxxxxxx=20 href=3D"mailto:AUDITORY@xxxxxxxx">AUDITORY@xxxxxxxx</A> = </DIV> <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, February 13, 2006 = 6:21=20 PM</DIV> <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> sound = manipulations</DIV> <DIV><FONT face=3DArial></FONT><FONT face=3DArial></FONT><FONT=20 face=3DArial></FONT><BR></DIV> <DIV class=3DSection1> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN = style=3D"FONT-SIZE: 10pt">Dear=20 List,<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN = style=3D"FONT-SIZE: 10pt">I am=20 writing to request information on a type of software or available = program that=20 allows for signal manipulations that may approximate hearing impaired=20 listeners=92 descriptions of speech. As you know, one common = complaint is=20 that people sound as if they are speaking in a barrel. Another = is that=20 the speaker sounds as if he has a bucket over his head. Is = anyone aware=20 of such a program?<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt">Sincerely,<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial color=3Dmaroon size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt; COLOR: maroon">Ren=E9 H. Gifford, Ph. D.,=20 CCC-A</SPAN></FONT><o:p></o:p></P> <P class=3DMsoNormal><FONT face=3DArial color=3Dmaroon size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt; COLOR: maroon">Postdoctoral=20 Fellow</SPAN></FONT><o:p></o:p></P> <P class=3DMsoNormal><st1:place w:st=3D"on"><st1:PlaceName = w:st=3D"on"><FONT=20 face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt">Arizona</SPAN></FONT></st1:PlaceName><FONT=20 size=3D2><SPAN style=3D"FONT-SIZE: 10pt"> <st1:PlaceType=20 w:st=3D"on">State</st1:PlaceType> <st1:PlaceType=20 = w:st=3D"on">University</st1:PlaceType></SPAN></FONT></st1:place><o:p></o:= p></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt">Department of Speech and Hearing=20 Science</SPAN></FONT><o:p></o:p></P> <P class=3DMsoNormal><st1:address w:st=3D"on"><st1:Street = w:st=3D"on"><FONT=20 face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt">P. O.=20 Box</SPAN></FONT></st1:Street><FONT size=3D2><SPAN style=3D"FONT-SIZE: = 10pt">=20 870102</SPAN></FONT></st1:address><o:p></o:p></P> <P class=3DMsoNormal><st1:place w:st=3D"on"><st1:City = w:st=3D"on"><FONT face=3DArial=20 size=3D2><SPAN style=3D"FONT-SIZE: = 10pt">Tempe</SPAN></FONT></st1:City><FONT=20 size=3D2><SPAN style=3D"FONT-SIZE: 10pt">, <st1:State = w:st=3D"on">AZ</st1:State>=20 <st1:PostalCode=20 = w:st=3D"on">85287-0102</st1:PostalCode></SPAN></FONT></st1:place><o:p></o= :p></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 11pt"> <o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D1><SPAN=20 style=3D"FONT-SIZE: 7.5pt">Phone: (480) = 965-4954</SPAN></FONT><o:p></o:p></P> <P class=3DMsoNormal><FONT face=3DArial size=3D1><SPAN = style=3D"FONT-SIZE: 7.5pt">Mail=20 Code: 0102</SPAN></FONT><o:p></o:p></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 11pt"> <o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D1><SPAN = style=3D"FONT-SIZE: 7.5pt"><A=20 = href=3D"mailto:rgifford@xxxxxxxx">rgifford@xxxxxxxx</A></SPAN></FONT><o:p><= /o:p></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: = 11pt"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML= > ------=_NextPart_000_00E8_01C630DB.24AA7600--