Sound waves and frequency problem

[King Elizabeth]

Homework Statement

A public-address system is usually used in the school assembly to obtain better attention from students. Carry out a study on the factors affecting the audibility of sound.

Homework Equations

The Attempt at a Solution

Objective: To study how does the frequency of the sound are affected by tension, length and material of the string. This objective was rejected by teacher. I had come up another objective which is to investigate the relationship between the amplitude and frequency and the loudness of sound was also rejected. Any other suggestions regarding this topic?[/B]

 

[andrevdh]

It seems that you need to investigate what has an influence
on how well the students can hear the messages over the PA system.
That would be the PA system itself, maybe how well it reproduces various
frequencies, how loud should one talk into it or how close one's mouth should
be to the microphone, does it transmit lower frequencies (male voice) better than
higher frequencies (female voice), and external influences once the waves are in the air, like wind,
position of the student with respect to the PA system, temperature of the air...

 

[King Elizabeth]

Thanks.
It helps me a lot