Phonorecord

A phonorecord is defined by the United States Copyright Act of 1976 to be a material object which embodies sounds (other than those accompanying audio-visual recordings such as movies), for example cassette tapes, CDs or albums.

To explain the difference, a person or group takes a song and makes a performance. That performance is a sound recording (also called phonogram); the physical media that the sound recording is stored upon is a phonorecord.