A sample i made in cubase. A man saying get me out heavily reverberated. W/ added feedback that i pitch shifted and reverberated. And lots of whispering voices in different pitches.
I created this spoof auto switchboard for when i get spam calls on the telephone in the uk, simply start the file playing when you do not recognise an incoming call by the caller id, place your phone close to the speaker and let it run. The intent is to make the spammer caller think that the number is just an auto switchboard and hopefully remove the number from their database.
To create this sound, i created a sinusoid of 500 hz and an amplitude of 0. 8. I then multiplied the speed of 0. 750. To get this final sound is to duplicate the sinusoid several times.