Yes, it is possible to change the sound of your voice through training, exercises, and vocal techniques. Voice training can help individuals alter their voice characteristics such as tone, pitch, resonance, and overall quality of speaking style. Here are some ways voice training can help in changing voice characteristics:

1. Breathing Exercises: Proper breathing techniques can help in controlling the airflow to produce a more stable and controlled voice.

2. Pitch Control: Voice exercises can help individuals expand their vocal range, allowing them to reach higher or lower notes as desired.

3. Resonance Modification: Techniques such as adjusting the placement of sound within the vocal tract can help in changing resonance for a richer or more resonant voice.

4. Articulation Practice: Working on pronunciation and articulation can enhance clarity and overall sound quality.

5. Tone Adjustment: Vocal coaches can help individuals develop a tone that suits their desired style, whether it’s authoritative, warm, friendly, etc.

Voice training with a professional vocal coach or speech therapist can provide personalized guidance and exercises tailored to an individual’s specific needs and goals. Consistent practice and dedication are key to achieving noticeable changes in voice characteristics over time.