How to Practice head voice octave slides (sirens) to strengthen your singing voice
In this two-part singing lesson, Kevin Richards will teach you about octave slides, sometimes called octave sirens, which are vocal drills that well help increase the range of your head voice and strengthen the transition between chest and head registers. This vocal exercise can be done anytime, anywhere. There's no need for a piano or audio scale.
These simple octave slides will help bridge chest voice with head voice in one seamless movement. Developing strength in the voice to sing high and with lots of volume takes coordination and knowledge. In the second video, Richards explains more of what is going on in your larynx and with your breath support.