Did Birgit Nilsson's voice lose quality as she aged?
No
Yes
Only in her highest notes
Only in her lowest notes
Answer
While many opera singers' voices begin to lose quality as they age, Nilsson's voice continued to improve into her later years. This was due in part to her unique vocal technique, which allowed her to maintain a high level of vocal production even as her vocal cords aged.
Birgit Nilsson: The Magnificent Voice of Opera – Can You Hit the High Note in This Quiz?