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                                                                     EXHIBIT 5.1


                                 August 7, 2001


Plantronics, Inc.
345 Encinal Street
Santa Cruz, CA 95060

         RE:  REGISTRATION STATEMENT ON FORM S-8

Ladies and Gentlemen:

         We have examined the Registration Statement on Form S-8 to be filed by
you with the Securities and Exchange Commission on or about August 8, 2001 (the
"REGISTRATION STATEMENT"), in connection with the registration under the
Securities Act of 1933, as amended, of an additional 2,000,000 shares of your
Common Stock, par value $0.01 per share (the "SHARES") reserved for issuance
under the your 1993 Stock Option Plan (the "PLAN"). As legal counsel for
Plantronics, Inc., a Delaware corporation, we have examined the proceedings
taken and are familiar with the proceedings proposed to be taken by you in
connection with the issuance and sale of the Shares pursuant to the Plan.

         It is our opinion that, when issued and sold in the manner described in
the Plan and pursuant to the agreements which accompany each grant under the
Plan, the Shares will be legally and validly issued, fully-paid and
non-assessable.

         We consent to the use of this opinion as an exhibit to the Registration
Statement, and further consent to the use of our name wherever appearing in the
Registration Statement and any amendments thereto.

                                   Very truly yours,


                                   WILSON SONSINI GOODRICH & ROSATI
                                   Professional Corporation

                                   /s/ Wilson Sonsini Goodrich & Rosati