Question

the reason that our cell phone speakers arent very loud: sound is a physical sensation and they are too small. cell phones arent advanced enough yet. form is more important than function. additional speakers have to be hooked up.

Explanation:

Cell phone speakers' volume is related to their physical size. Smaller speakers have limited space for sound - generating components. Sound production is a physical process where larger components (in speakers) can move more air (a key factor in loudness). Since cell phone speakers are designed to be small (for the phone's compact form), they can't produce as much sound as larger speakers. The option "Sound is a physical sensation and they are too small" directly addresses this physical - size - related limitation. The option "Cell phones aren't advanced enough yet" is not a valid general reason as cell phone technology is advanced in many aspects. "Form is more important than function" is a rather broad and not the most accurate technical reason for the speaker volume issue. "Additional speakers have to be hooked up" is more of a workaround rather than the fundamental reason for the inherent lack of loudness in built - in cell phone speakers.

Answer:

Sound is a physical sensation and they are too small.