Sound waves can travel through solids ... Sounds are made when objects vibrate. Soundwaves make the air around vibrate and the air vibrations enter your ear. You hear them as sounds.

Sounds are made when objects vibrate. Soundwaves make the air around vibrate and the ... but if something is making a sound, some part of it is always vibrating.

Scientists have demonstrated a simple method to create complex sound fields in three dimensions to move objects. The new research uses 3-D printed plates to create acoustic holograms that are a ...