what is is called (both terms) when somthing makes a sound but no one is aroun to here it? Plz this is 4 my h work

It could be many terms. Unobserved Source comes to mind. Surely you are not wasting much class time in physics class on this.

The concept you are referring to is commonly known as the "philosophical question of whether a tree falling in a forest makes a sound if no one is around to hear it." This question is often used to explore the nature of perception and reality.

To approach this question, we can consider the following:

1. Sound as a physical phenomenon: Sound is a form of energy that is produced by vibrations traveling through a medium, such as air. Thus, if a tree falls in a forest, it creates vibrations that propagate through the air, which would technically qualify as "sound" in a physical sense.

2. Perception of sound: However, sound also involves the act of hearing and perceiving those vibrations by a conscious observer. In the absence of an observer, there would be no one present to detect or perceive those vibrations as sound.

Therefore, the different terms that can be used to describe this situation are:

1. Objective sound: Referring to the physical vibrations that occur when a tree falls, regardless of whether there is an observer present or not.

2. Subjective sound: Referring to the perception and experience of sound by a conscious observer. In the absence of an observer, there would be no subjective experience of sound.

It is important to note that the philosophical implications of this question can vary, and different schools of thought may have alternate interpretations.