Yes, when the loudness is below 85 dBSPL.
sound sounds like sound
ans2. Sounds have the parameters of pitch and volume, as well as modulation. These are as various as are the words in a book - their combinations will differ and each be distinguishable.
To us humans, we can hear sound waves from 20000 Hz and 20 Hz
The amplitude (The height of the wave) of the wave increases as the sound gets louder.