Acertain sound contains the following frequencies: 400 hz, 1600 hz, and 2400 hz. select the best description of this sound view available hint(s) ▼ hint 1. how to identify a fundamental within a series of frequencies a. this is a pure tone. b. this is a complex tone with a fundamental of 400 hz, plus some of its overtones. c. this is a complex tone with a vrtual pitch of 800 hz d. these frequencies are unrelated, so they are probably pure tones from three different sound sources.