In this way any noise obtained by a rotating movement can offer an entire ascending or descending chromatic scale , if the speed of the movement is increased or decreased . Every manifestation of our life is accompanied by noise . The noise , therefore , is familiar to our ear , and has the power to conjure up life itself . Sound , alien to our life , always musical and a thing unto itself , an occasional but unnecessary element , has become to our ears what an overfamiliar face is to our eyes . Noise , however , reaching us in a confused and irregular way from the irregular confusion of our life , never entirely reveals itself to us , and keeps innumerable surprises in reserve .

Select from the following.
- It can conjure forth a visual manifestation ..
- It can make you recognize a familiar face ..
- It can catch you off guard ..
- None of the above choices ..
Answer the following question: What might happen is noise finds its way into your life suddenly ?
It can catch you off guard .