Determining your voice type based solely on your vocal range can be challenging without additional information such as your vocal timbre, tessitura, and vocal quality. However, based on the range you provided, it seems to cover a wide span from C2 to A5, indicating a broad vocal range.
Typically, vocal ranges are classified into different voice types, such as soprano, mezzo-soprano, alto (female voices), tenor, baritone, and bass (male voices). However, these classifications go beyond just range and consider factors like vocal quality, tessitura (the comfortable range of your voice), and other technical aspects.
To accurately determine your voice type, it's best to consult with a vocal coach or a trained professional who can assess your voice in person. They will consider your entire vocal range, vocal timbre, agility, and other factors to provide a more accurate classification.
Regarding falsetto, it is a singing technique commonly used in male voices. It involves producing a lighter and breathier tone by allowing the vocal folds to vibrate partially rather than fully coming together. Falsetto is typically employed in the upper range of the male voice. When singing in falsetto, you might notice a significant change in the quality and timbre of your voice, with a more heady and ethereal sound.
If you are unsure whether you are singing in falsetto, a vocal coach or a trained professional can provide guidance and help you identify the specific vocal register you are using.
As for the specific note C7 that you can hit using whistle tones, it's impressive! Whistle tones, also known as whistle register or flageolet, are extremely high-pitched tones produced by manipulating the airflow and resonance within your vocal tract. They are often used for special effects or ornamentation in singing. If you would like to develop your whistle tone further or seek assistance with it, it would be advisable to work with a vocal coach who specializes in extended vocal techniques.
Remember, working with a professional can greatly help you understand and develop your vocal abilities while ensuring proper technique and vocal health.