One has to practice a specific way of holding the mouth, called Embouchure. This is key to blowing a Conch, or “Sankha”. It’s not just how you purse the lips, but how you hold them stiffly together and against the teeth. This braces the buzz you need to create for Sankha, and also reinforces the air from the lungs. Think of it like the sound comes from your heart or the diaphragm, not from the Instrument. In one long stream, as if you are singing a loud sustained note, blow from the diaphragm, not from higher up in the chest or throat like when you speak.
The note and tone are expressed and modulated by the shape of your lips and how they vibrate together. Changing their shape, thus their vibration, will change the note. You can practice without the Conch, hold your lips tight in one place but not so tight you can’t blow through them and make them buzz, hold your chin flat, and hold your cheeks in – do not let them puff out. You should be able to feel the corners of your mouth. Take a deep breath and let your lips buzz together.
Change the shape of your embouchure by pulling back the corners of your lips to make them more of a straight line, or pursing to make less of one, and the tone of the buzz you make gets higher or lower respectively.
Due to blowing of shankha, the frequencies consisting raja–tama particles are destroyed and at the same time the saviour and destroyer principle of a deity is awakened. Now let us see the correct method of blowing the shankha.
First slightly raise your neck and bend it little backwards and keep the mind focused. Take a deep breath and start to blow with increasing intensity. One should keep in mind that blowing of shankha should be completed in one single breath. When the shankha is blown in this way Sushumna channel of the individual gets activated and it helps in keeping a correct balance of raja and sattva particles related to Tej (space) and Vayu (air) elements. This awakens the saviour and destroyer principle according to the need.
Manifestation of negative energies due to the sound of the shankha: Due to the sound energy generated by blowing shankha, subtler frequencies flowing down from the universe get activated. They cause disintegration of raja-tama particles in the atmosphere within a short time. Due to the momentum of frequencies of sound energy emanating from the shankha, there is friction between raja–tama particles, resulting in subtle flames. As a result the sheath around the aerial bodies of negative energies starts to burn. That is why negative energies are unable to tolerate the sound of a shankha. They are compelled to manifest because of this sound