I am 27 years old and used to be very confident, but I have been realizing I have got a childish voice. I have lost my confidence. Please let me know how to get my voice thicker like a mature man.
Developing the voice to be stronger and deeper takes time and is best achieved with a vocal coach. You should work for only 10 or 15 minutes at a time at first. Part of what you need is for the vocal cords to come together in a more energetic manner when you start a sound. You can practice making a weaker tone by starting any vowel sound with an “h” and then make a stronger tone by starting the same vowel with a glottal attack. The ideal sound is started with neither an “h” nor a glottal attack but is balanced exactly between the two. You also need to feel the resonance vibrating your breast bone and ribs. You can use “oh” on a lower pitch to help develop this. If you don’t have a voice coach or speech therapist in your locale, you can look for programs including the VOCAL TUNE-UP FOR SPEAKERS that can be downloaded from this site.