What nonHindus refer to as chakras have nothing to do with the chakras. They actually refer to the physical body energies and aura.
Chakras are not in the physical body. They do not open or close. As we are made up of the same vibrations that make up the cosmos, our chakras respond to sound. The music and chanting in Sanskrit has a vibratory effect on the karma stored in our chakras and can ameliorate our karma.