We know that if we send one electron through 2 slit, the wave function

[hokhani]

we know that if we send one electron through 2 slit, the wave function on the curtain(detector) is a wave that it's maximum is in the center. and we can find electron anywhere on the curtain according to it's probability. but i want to know whether we observe the electron on all part of the curtain(such as it's wave shape) or we observe only in one point?
for example
if we send an electron(just one electron) through the 2slit, then take a point detector(very small detector in a point on the curtain) that makes sound after the electron collision, would we certainly hear any sounds(as a result of attending the electron everywhere) or not(it would just collide with one point that may not be on your point detector)?

 

[jtbell]

Each electron arrives at one point. When you send more than one electron through the apparatus, they arrive at different points, and eventually the interference pattern "builds up."

http://www.hitachi.com/rd/research/em/doubleslit.html