A Speaker Is Designed for Wide Dispersion for a High

question 39

Multiple Choice

A speaker is designed for wide dispersion for a high frequency sound.What should the diameter of the circular opening be for a speaker where the desired diffraction angle is 11° and a 9100 Hz sound is generated? The speed of sound is 343 m/s.

• A)0.039 m
• B)0.077 m
• C)0.24 m
• D)0.13 m
• E)0.048 m