Underlying this primordial symphony is a rhythmically pulsing and unidentifiable noise: It sounds as if the very world were breathing.

They passed many caves where, as Augray told him, sorns lived; sometimes a high cliff would be perforated with countless holes to the very top and unidentifiable noises came hollowly from within.

While waiting downstairs completely alone in the dark, Micheal hears a loud unidentifiable noise from the bedroom upstairs.

Perian had a retort prepared, when suddenly, from the doorway straight ahead came the sound of clattering glass and metal and some other unidentifiable noises as well.

This was no unidentifiable noise but a scream which held both terror and pain.

Her sister made some sort of unidentifiable noise and said, "No, oh no!"

The nearby rooms of the hotel emit a constant chorus of guttural cries, moans, and assorted unidentifiable noises.

As the sun climbed higher, she heard a great many usually unidentifiable noises, and a good bit of servants' gossip and chatter.

And then he had heard a low, unidentifiable humming noise, like bees in an immense hive.

It's not hard to understand why radio stations didn't jump at the chance to play music full of unidentifiable noises and lacking in melody.