Is a squeaky voice hindering your communication? You can improve your delivery by improving your pitch.

The high-pitched voice is a handicap for anyone in business. It is irritating and lacks authority. Although it is usually associated with women, I have worked with many men who have high-pitched voices.

Take a small breath and, as you exhale, say "ah ha" as though you were surprised at something someone said. Then try "um-hum" with lips closed as though you were questioning something someone said. Both of these phrases will cause your voice to settle to its true pitch level, the level you want to work toward.

To determine the pitch level at which you are currently speaking, say in your natural voice range, "I am going to lower the sound of my voice." As you say the phrase move your voice into a singing tone at the same pitch level. This is the pitch level at which you are currently speaking. If it is a significantly different pitch level from the "ah-ha" or "um-hum," you will want to work toward matching your pitch to the pitch of the two phrases.

If your aim is to establish your voice at a lower pitch level, repeat the above sentence, lowering the pitch one tone each time you say it until you arrive at a pitch level close to "ah-ha" and "um-hum." If you think your voice is too low, reverse the exercise, gradually moving it, tone by tone, to a higher pitch. Experiment with this exercise until you arrive at the pitch level that sounds best in your voice.
Valuable solutions to public speaking and vocal improvement can be found in Building the Power of Your Voice: How to Improve Your Voice to Command Attention & Move People to Action
http://101publicrelations.com/voicepower.html?utm_source=prideas&utm_content=voice_power