Fish are likely to have been able to detect sound from a very early period.

Were there instruments to detect sound or movement from above?

The Shadow detected the sound only because his ear was close to the wall on the right.

Sometimes they detected the slightest sound of his movement as he came down the stairs.

Like Charlie, he had detected no movement or sound coming from the cottage but that didn't mean anything.

One use for this is to detect sounds of a very low level, such as those from small objects or insects.

These tests measure one's ability to understand speech, not to merely detect sound.

However, his hearing no longer detected the sound of hoofbeats ahead.

Do I have trouble detecting sound, discriminating words, or both?

His ears were quick to detect sounds that they heard from above deck.