# Sound can reach another object

A sound source vibrates: it moves back and forth. Sound energy can travel through air. When sound reaches another suitable object, that object can vibrate too.

One real example is the eardrum. Incoming sound waves can make this thin part of the ear vibrate. Hearing involves more steps after that; this short text does not show the whole ear or test anybody’s hearing.

We may not see tiny, fast vibrations in a gentle classroom try. A hand moving paper is a direct-contact action. It is different from sound arriving from another source and making a receiver vibrate. A drawn arrow explains the idea; it is not a measured result.

[Original source–air–receiver illustration and full alternative](../aids/ALTERNATIVES.html)

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**Source check, 8 October 2026:** Original brief explanation of general facts supported by [NIDCD, How Do We Hear?](https://www.nidcd.nih.gov/health/how-do-we-hear) (updated 16 March 2022) and the current ACARA Year 2 Science description. No medical advice, diagnosis, hearing test, copied anatomy image or source media. This factual account is distinct from the pack’s invented listener notes. Response route can be wholly quiet.

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