Masking distracting sounds with what is called white noise--
for example , static or rushing air- can be usefull in some environments, such as offices. *

* Just as white light is a mixture of all frequencies in the light spectrum,
white noise is sound that contains all the frequencies within the audible range , at approximately equal level of loudness. *

In Japan silent pianos have come on the market.
Instead of strikeing the string , the hammer activates an electronic circuit that produces the note in the earphones on the player.

Noise and You...

" Noise is the most widespread industrial hazard in Britain today " notes the Times , " and deafness it's common consequence.
" some occupational - health studies indicate that noise above 85
decibles can harm a fetus.

The baby's hearing is damaged ,
and the baby may have hormonal disturbances as well as birth defects.
Exposure to loud noise constricts blood vessels and decreases the flow of blood to your organs.

In turn your body reacts by producing hormones that raise blood pressure and increases your heartbeat,
sometimes leading to palpations or even angina.

When sleep disrupts your routine, other problems can occur.
Disturbed sleep can effect your daytime reactions.

Noise may alter the overall speed at which you work,
but it also can have a bearing on the number of errors you make.