AUTHORIZATION LETTER
August 28, 2002
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549
Attn:  Filing Desk
To Whom It May Concern:
By means of this letter I authorize Linda L. Carloni, Jane A. Freeman, and Robert C.
Bowen, or any of them individually, to sign on my behalf all forms required under
Section 16(a) of the Securities Exchange Act of 1934, as amended, relating to
transactions involving the stock or derivative securities of Scientific Learning Corporation
(the "Company").  Any of these individuals is accordingly authorized to sign any Form 3,
Form 4, Form 5 or amendment thereto which I am required to file with the same effect as
if I had signed them myself.
This authorization shall remain in effect until revoked in writing by me.
Yours truly,
/s/ Joseph B. Martin


Name: Joseph B. Martin
	(please print)