One of the biggest challenges facing most singers is the high end of the voice: those notes which are at or slightly above the range where singing is comfortable. Often that part of the voice sounds strained, or if abused too often becomes permanently strident.
This is not good.
As a young bass, my voice coaches often despaired of my ever being able to sing above the staff – anything above a B-flat for me was a real struggle. Looking back on it now, I can see what I was doing wrong (and where they missed some chances to help).
I’ll stick with my side of things. For too long I tried to muscle my voice up to the high notes. What I really needed to do was back off the pressure and tension I was putting on my throat and free up the vocal mechanism. More importantly, I had to learn to place the voice up into the big resonating chamber of the head. (Note: placing the voice in the head is a conceptual process, not a physical one. More on the mechanics shortly.)
If you are having trouble with the top of your range, try using a more gentle approach to singing. Relax the neck and shoulders. Lift the ribs and take a comfortable breath. Open your mouth tall, not wide, and imagine your voice floating above your head. Then gently sing a note that you know is higher than you are normally comfortable with. Don’t worry about the exact pitch, the idea here is to see how effortless it can be, and notes can get in the way at this point.
If you can grasp this idea, listen to the quality of the note you just sang. It may sound nothing like your regular singing voice at this point. That’s OK. There will be time to develop that sound later. It is important not to rush this process, as you can hurt yourself trying to do too much too soon.
When you achieve this free-floating high, light sound (not falsetto) you should feel a “buzz” up in your nose, behind the eyes, and along the brow ridge. That is because your sinuses carry most of the resonance in that range. With the relaxed neck and open mouth you are actually lifting the soft palate and giving your voice more room.
Once you have discovered the buzz you should work on bringing it down into the middle part of your voice as well.A real benefit of discovering and exercising this part of your voice range is the fact that it adds depth to the rest of your voice by opening up the overtones of your voice and giving it a vibrant resonance. With consistent practice you should find yourself singing notes you had previously given up on with relative ease.