Exhibit 99(a) CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Quarterly Report of NCT Group, Inc. ("NCT") on Form 10-Q for the period ending June 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), we, Michael J. Parrella, Chief Executive Officer of NCT, and Cy E. Hammond, Chief Financial Officer of NCT, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) The Report fully complies with the requirements of the Securities Act of 1933, as amended; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of NCT. /s/ Michael J. Parrella - ----------------------- Michael J. Parrella Chief Executive Officer August 14, 2002 /s/ Cy E. Hammond - ---------------------- Cy E. Hammond Chief Financial Officer August 14, 2002