how to set initial volume of a very brief WAV audio in iPad Mobile Safari ?

Question

Is it possible to set the starting volume of a WAV audio on iPad Safari? My audio is very brief (512 bytes, a clicking sound) and I haven't been able to lower its volume, either by including a volume="0.1" attribute in the HTML or by setting myAudio.volume=0.1 immediately before invoking myAudio.play()

Here is a slightly different, though no doubt related, posting about being unable to change the volume while it's playing (I want to set volume before the audio begins playing):

http://stackoverflow.com/questions/1711279/javascript-audio-video-element-control-volume-programmatically