Exam 17: The Principle of Linear Superposition and Interference Phenomena

For a diffraction horn loudspeaker, the sound emerges through a rectangular opening. The width of a diffraction horn is 0.14 m. If the speed of sound in air is 343 m/s, at what frequency is the diffraction angle $\theta$ equal to 35°?

A guitar string produces 4 beats/s when sounded with a 250 Hz tuning fork and 9 beats per second when sounded with a 255 Hz tuning fork. What is the vibrational frequency of the string?

Which one of the following statements is true concerning the points on a string that sustain a standing wave pattern?

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 string with a length of 3.0 m has two adjacent resonances at frequencies 112 Hz and 140 Hz. -Determine the speed of the waves on the string vibrating at 140 Hz..

A cylindrical tube sustains standing waves at the following frequencies: 600 Hz, 800 Hz, and 1000 Hz. The tube does not sustain standing waves at 500 Hz, at 900 Hz, at any frequencies between 600 and 800 Hz, or at any frequencies between 800 and 1000 Hz. Determine the fundamental frequency of the tube and whether the tube is open at both ends or has only one end open.