Musicians can use beats to tune their instruments. One flute is properly tuned and plays the musical note A at exactly 440 Hz. A second player sounds the same note and hears that her instrument is slightly “flat” (that is, at too low a frequency). Playing at the same time as the first flute, she […]
Two identical loudspeakers 2.0 m apart are emitting 1800 Hz sound waves into a room where the speed of sound is 340 m/s . Part A Is the point 4.0 m directly in front of one of the speakers, perpendicular to the plane of the speakers, a point of maximum constructive interference, perfect destructive interference, […]
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 30 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 35 cm . Part A What is the wavelength of the sound? Express your answer to two […]
The first formant of your vocal system can be modeled as the resonance of an open-closed tube, the closed end being your vocal cords and the open end your lips. Part A Estimate the frequency of the first formant from the graph in (Figure 1) . Express your answer to two significant figures and include […]
A child has an ear canal that is 1.3 cm long. Part A At what sound frequencies in the audible range will the child have increased hearing sensitivity? Express your answer using two significant figures. If there is more than one answer, separate them by a comma.
Parasaurolophus in (Figure 1) was a dinosaur whose distinguishing feature was a hollow crest on the head. The 1.6-m-long hollow tube in the crest had connections to the nose and throat, leading some investigators to hypothesize that the tube was a resonant chamber for vocalization. Part A If you model the tube as an open-closed […]
Ocean waves of wavelength 30 m are moving directly toward a concrete barrier wall at 4.1 m/s . The waves reflect from the wall, and the incoming and reflected waves overlap to make a lovely standing wave with an antinode at the wall. (Such waves are a common occurrence in certain places.) A kayaker is […]
A violin string has a standard length of 32.8 cm. It sounds the musical note A (440 Hz) when played without fingering. Part A How far from the end of the string should you place your finger to play the note C (523 Hz)?
The figure shows a standing wave oscillating at 100 Hz on a string. (Figure 1) Part A What is the wave speed?
(Figure 1) is a snapshot graph at t = 0 s of two waves on a taut string approaching each other at 1 m/s. Part A Select six snapshot graphs, stacked vertically, showing the string at 1 s intervals from t = 1 s to t = 6 s. Drag the appropriate labels to their […]