In the panthera species, the hyoid bone in the throat is not completely ossified. Instead of small bones, the hyoid bones are connected with a six inches elastic ligament. (Figure 16)This ligament can be further stretched longer, which allows the larynx to move further away, thus increasing the resonance and lowering the pitch (Pocock,1916). The voice is produced by the air. Inside the animal’s bodies, the volume of the voice depends on the air pressure from our lungs and the vibration of the vocal cords which are composed of folds of tissues(D'mello,2020). Like tigers and lions, the snow leopards have a comparably large size of laryngeal, and thus a larger size of the vocal cord. What’s more, the vocal cords of the snow leopards are square sized, which means that they can produce higher volume with less pressure from lungs(Weissengruber,2002). Even though the snow leopards have all those panthera laryngeal characteristics, they are not able to roar because they don’t have the important fibro-elastic tissue that increases the mass of the vocal cord -- vocal pad. This large portion of fiber-elastic tissue increases the area of the vocal cord of the other panthera species, thus decreasing their natural frequencies and producing high volume. (Figure 17).While for snow leopards that don’t have this extra vocal pad, the ability to generate sounds is weaker and that makes the snow leopard the only non-roaring exception in the panthera species(Hast,1989).