Subject: Re: Multifrequency Tympanometry From: Navid Shahnaz <nshahnaz@xxxxxxxx> Date: Sun, 15 Oct 2006 18:21:23 -0700Thank you for correcting me; that was what i meant but didn't come out right :-); RF is proportional to Square root of stiffness and indirectly proportional to square root of mass Cheers Navid Navid Shahnaz, Ph.D Assistant Professor School of Audiology & Speech Sciences Faculty of Medicine 5804 Fairview Ave. Vancouver, B.C. V6t 1Z3 Canada Tel. 604-822-5953 Fax. 604-822-6569 E-mail: nshahnaz@xxxxxxxx Website: http://www.audiospeech.ubc.ca/school/faculty/navid/ ---------- Original Message ---------------------------------- From: "reinifrosch@xxxxxxxx" <reinifrosch@xxxxxxxx> Reply-To: reinifrosch@xxxxxxxx Date: Sun, 15 Oct 2006 11:20:16 +0000 >Hello Navid and List, > >A technical comment: > >The resonance frequency is proportional to the square root >of the stiffness, and indirectly proportional to the square root >of the mass. > >Example: > >A sphere of mass M on a spring of stiffness (i.e., spring >constant) S. > >In the SI (système international), the dimension >of M is kg, and that of the spring constant S is N/m >(Newtons per metre). > >Tne Newton is the unit of force, i.e., of mass times >acceleration, and thus is equal to one kg * m / s^2. > >So the dimension of the stiffness S is kg / s^2, and that of >the square root of (S/M) is 1/s, equal to the dimension of >frequencies. > >Reinhart Frosch. > >Reinhart Frosch, >Dr. phil. nat., >r. PSI and ETH Zurich, >Sommerhaldenstr. 5B, >CH-5200 Brugg. >Phone: 0041 56 441 77 72. >Mobile: 0041 79 754 30 32. >E-mail: reinifrosch@xxxxxxxx . > >----Ursprüngliche Nachricht---- >Von: nshahnaz@xxxxxxxx >Datum: 14.10.2006 18:06 >An: <AUDITORY@xxxxxxxx> >Betreff: Re: Multifrequency Tympanometry > >Hi > >[...] Resonant frequency is directly proportional to the >square of stiffness and indirectly proportional to the >effect of mass. [...] > ________________________________________________________________ Sent via the WebMail system at audiospeech.ubc.ca