JOINT FILING AGREEMENT
EXHIBIT 1
In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as
amended, the persons named below agree to the joint filing on behalf of each of them a Statement on
Schedule 13G (including amendments thereto) with regard to the common stock of Natus Medical
Incorporated and further agree that this Joint Filing Agreement be included as an Exhibit to such
joint filings. In evidence thereof, the undersigned, being duly authorized, hereby execute this
Joint Filing Agreement as of February 8, 2006.
THE PINNACLE FUND, L.P. |
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By: | Pinnacle Advisers, L.P., its general partner | |||
By: | Pinnacle Fund Management, LLC, its general partner | |||
By: | /s/ Xxxxx X. Xxxx | |||
Xxxxx X. Xxxx, its sole member | ||||
/s/ Xxxxx X. Xxxx | ||||
Xxxxx X. Xxxx | ||||