When two bodies collide, the sound that is produced comes from both bodies involved in the collision. Let's break it down:
When two objects collide, they exert forces on each other, leading to deformation and compression of their surfaces. These deformations create vibrations in the objects, which propagate as waves through the surrounding medium, typically the air.
The sound is generated by these vibrations, which cause the air molecules to compress and decompress, forming a series of pressure waves. These pressure waves travel through the air, reaching our ears and being perceived as sound.
In the case of a collision, each object involved contributes to the generation of sound. The vibrations and resulting pressure waves are created both in the object that initiates the collision (the first article) and the object it collides with (the second article). The intensity and characteristics of the sound produced depend on various factors such as the nature of the objects, their materials, shapes, masses, and the energy transferred during the collision.
In summary, the sound produced during a collision originates from both colliding bodies. The impact and subsequent vibrations generate pressure waves in the surrounding medium, which we perceive as sound.