Sound waves are invisible to the eyes. The only way you can pick up sound waves is trough ears and some sound waves can be felt. Since sound waves are traveling longitudinal pressure waves of audible sound.
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what is sound waves
a longitudinal wave in an elastic medium, especially a wave producing an audible sensation.
Sound is a mechanical vibration that travels through any matter as a waveform. Most of the time we think about sound moving through air, but it can travel through any matter. Basically, something pushes the particles in the air and that causes them to bump into each other in a chain reaction. This allows the energy of the sound wave to travel while the air itself only move a little bit.