Singing voice: acoustic parameters after vocal warm-up and cool-down

Area of Science:

• Vocal pedagogy
• Acoustic analysis
• Speech and hearing science

Background:

• Singing requires optimal vocal function, which can be affected by intense vocal activity.
• Acoustic parameters like Fundamental Frequency (F0), Jitter, Shimmer, and harmonics-to-noise ratio (HNR) are key indicators of vocal health.

Purpose of the Study:

• To evaluate the impact of vocal warm-up and cool-down routines on the acoustic characteristics of the singing voice.
• To assess changes in F0, Jitter, Shimmer, and HNR following specific vocal exercises.

Main Methods:

• Thirty-two female singing students participated in the study.
• Vocal recordings were made before and after warm-up and cool-down sessions, interspersed with intense vocal activity.
• Acoustic parameters (F0, Jitter, Shimmer, HNR) were measured using vowel [a] utterances.

Main Results:

• Vocal warm-up led to decreased Jitter and Shimmer, and increased HNR.
• Vocal cool-down resulted in a lower mean F0 compared to pre-cool-down levels.
• Intense vocal activity increased mean F0, while cool-down helped reduce it, indicating recovery.

Conclusions:

• Vocal warm-up positively impacts acoustic parameters, improving vocal quality.
• Vocal cool-down is effective in promoting vocal recovery and reducing vocal fold tension in singers.
• These findings underscore the importance of structured warm-up and cool-down for maintaining vocal health in professional singers.