2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/73652We construct new classes of Parseval frames for a Hilbert space which allow signal reconstruction from the absolute value of the frame coefficients. As a consequence, signal reconstruction can be done without using noisy phase or its estimation. This verifies a longstanding conjecture of the speech processing community.15 pages, latex2eFunctional Analysistext