Underlying Reasons for Head-Dominant Singing in Pop Music
I believe the primary reason head-dominant singing is less common in pop music is that many singers do not know how to incorporate it effectively, or they simply prefer a different approach. Hardly any pop music vocalists I've heard demonstrate a truly unified vocal technique. Most tend to stay in their chest voice range with occasional belting or use a light, falsetto-like quality that lacks the dynamic support found in classical singing techniques.
Pop Music: The People's Music
Pop music is essentially the people's music—it is accessible, easy to learn, and sing for the average person. In contrast, classical or opera is highly stylized, requiring extensive training in both vocal technique and different styles. Despite this, many pop and folk singers do incorporate head voice into their performances.
You can think of it as a distinction between dancing in a disco and ballet dancing. Disco dancing often requires a more unified, consistent style that the general public can relate to and mimic, whereas ballet requires intricate training and a specific technical foundation.
Technical and Cultural Factors Influence
As Skylar aptly noted, most pop singers do not receive the technical training necessary for head-dominated classical or lyric singing. Additionally, a head voice that closely mimics the technique of lyric and big rock singers is a sound that many people can relate to and easily imitate.
Chosen Sound for Cultural Reasons
Over time, it has become popular for pop and mainstream genres to favor more chest register for elements like belting, which helps singers be heard in a live setting. The chest register provides a stronger and fuller sound, which is preferred by most listeners. Moreover, the typical pop singers we hear are often mezzos and tenors, who naturally excel in their chest register.
The Role of Community and Style in Singing Technique
The preference for a specific vocal technique in pop music can also be attributed to the community of singers and listeners. Singers who excel in their chest register are more likely to rise to the forefront of mainstream pop, thereby influencing the broader community. This influence, in turn, shapes future generations of singers.
Conclusion
While head-dominant singing does find a place in various genres, its rarity in pop music can be explained by the lack of technical training among many pop singers and the cultural preference for a fuller, more powerful sound. Understanding this dynamic is crucial for singers and educators who aim to foster a more diverse and technically adept vocal community.