On hearing Bheeshma’s call for battle, everyone in the Kaurava army also started playing various instruments eagerly, creating tumultuous sound.
Shaṅkhāḥ
means conches,
paṇav
are drums,
ānak
kettledrums,
bhreyah
bugles, and
go-mukh
are blowing horns. All these instruments playing together created a loud pandemonium.