https://www.youtube.com/watch?v=nlnEKdi9SOc&feature=channel_video_titleThis is from 2 years ago, but I can sing it (the whole song, not just the F#) better now with a lot more control. Being in a band has kind of helped me gain a lot of vocal confidence that has helped me to improve my head voice. I'm still working on it, as well as vocal stamina.
Teaching where I taught last year totally made me take a step back since I was misusing my voice daily (because the kids were obnoxious, and because I had no administrative support, I felt I had to yell when I normally wouldn't. It sucked). Singing this summer in choir is helping me rejuvinate my vocal stamina, and singing in the band (different band, mainly same people) is helping me develop my head voice to where it is stronger.
I'm not sure. I took some voice lessons in college and my instructor would say that I'm singing in a head voice but I wouldn't know it. When helping a friend with his jury one time by singing high tenor (alto) in a gospel quartet. My voice instructor was one of the observers. When I asked him what he thought about it he said nice things and called it my head voice.
When I'm vocalizing with scales I can hear a switch happen right around the F or F# area (above middle C). But the tone is basically the same. Perhaps that is my switch to head voice. As far as falsetto, it's strange but I can't sing falsetto very well. It's never been a part of my vocal training. I can only go a little higher in falsetto then my head voice. I get depressed when I listen to "Take On Me" by A-Ha and can't sing the low notes and can't sing the falsetto notes. But then again that guys voice is amazing.
When my voice was changing, I sang through my change. When it was developing I had a distinctive break, and throughout high school and college my voice teachers would help me develop my head voice to where it was almost indistinct. My falsetto overlaps a lot of my head voice, but there is a recognizable change in tone color when I sing in my head voice and in my falsetto. It feels different in my voice as well.