I love Adele - and her "Rolling in the Deep".
I love her CD; listen to it every day.
Her voice is honest, but, mostly, she is singing from her chest and throat. It may cost her. You can hear her going from chest to head when she sings the word 'deep' and moves the tone upwards. The note goes to her 'head' and the tone is clear and pure.
Head voice preserves the vocal when the range goes higher. Adam's range seems to transition freely from chest to head. This is a credible talent; not to be received lightly.
Taking a throaty, emotional tone and stretching it is doing your vocal cords no favor. If your 'best voice' is in your chest you realize it and use it. When you stretch that vocal range, and try to keep the notes that belong higher "in your head voice", instead, in your chest - - well, that's when the vocal cords become strained and can, over time, be damaged.
In my opinion, it cost Julie Andrews her light, ringing head-voiced tone; trying to belt it out in 'Victor-Victoria'.
The raspy, throaty tone of Adele will create laryngitis if she takes it to the high notes, because the tone, as genuine as it is, is forced. The forced, chest voice that tries to go higher and higher will break; as it did when Lauren Alaina in AI worked it up and up.
Laryngitis is not the result of singing too much. It is the result of forced singing; putting your voice in the wrong place. It's like yelling at a ball game; too much, too long.
A voice, placed where it belongs - chest or head - and supported with adequate breath control - will thrive with care and use. Hello Adam.
I'm no expert . . . but I've been performing for a long time.
