Question:
Whistle Register
Answer:
Refers to extremely high pitches in the female voice. These pitches tend to be less substantial or rich in tone than the rest of the voice (hence their name) although some singers (especially high sopranos) develop and integrate them very successfully. Producing them feels like “squeaking.” Practicing them can be useful to develop an easier, finer phonation on high notes and throughout the range. It can also help one find more overtones in the resonance no matter what pitches are being sung.