You will need
  • - handkerchief;
  • helium out of the balloon;
  • - voice changer or voice changer;
  • program to change voice.
Use a random noise generator for mobile phones. This device makes telephone conversations is protected and does not allow the caller to know your voice. It generates communication channel is a special noise that interferes with listening to the conversation. In addition, some models are equipped with a switch pitch. Changing this mode, you get a different tone of speech. The issue price for fixed-line phones from 100 to 250 dollars.
Connect to cell phone voice changer is based on Bluetooth technology. It allows you to conduct anonymous negotiations in real time and make a male voice to female and Vice versa. It can also change the timbre, tone and pitch of the sound during a call, to imitate noises like a barking dog, crying baby or a doorbell. It is sufficient to press a special button. In addition, the device provides good audibility even in noisy places. Cost about 120 $ 800.
Install on your computer free program to change the voice. The Internet offers lots of them. But the free program does not allow you to call in real time. You need to first write your petition to modify your voice, and then submit this record to the phone's microphone. That is, the dialogue in this case is almost impossible. Free JAVA application to use this technology online.
Apply the long-known methods, if none of the above suits you. For example, pinch the nose: you have to change the pronunciation. Attach to the tube scarf or any fabric - it is easy to do, but the method does not give an absolute guarantee of recognition. Inhale the helium from the balloon so to speak a few phrases is very high, even squeaky "baby" voice.