Physics

Two small loudspeakers that are 5.50 apart are emitting sound in phase. From both of them, you hear a singer singing C# (frequency 277 ), while the speed of sound in the room is 340 . Assuming that you are rather far from these speakers, if you start out at point equidistant from both of them and walk around the room in front of them, at what angles (measured relative to the line from to the midpoint between the speakers) will you hear the sound:

A)maximally enhanced? Neglect any reflections from the walls.
Type absolute values of all possible angles in increasing order separating them with commas.
A=??? in degrees

B)cancelled? Neglect any reflections from the walls.
Type absolute values of all possible angles in increasing order separating them with commas.
B=??? in degrees

  1. 👍 0
  2. 👎 0
  3. 👁 146
  1. You need to find distance from each speaker from the midpoint as a function of the angle.
    Then set the difference of distances equal to for a, multiples of wavelength of 277hz, and for b, multiples of half wavelengths.

    I would recommend use the law of cosines.

    Your known will be the base side (5.5/2 m), theta, and some distance on the radial from midpoint of the speakers to the chosen point, so you know SAS

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science--HELP!!

    1. In which of the following situations is a sound wave most likely to travel through air? A) An alarm clock rings in a vacuum. B) A giant star explodes. C) A grasshopper eats a leaf. D) An astronaut uses tools in space. 2. Which

    asked by Jasmine on December 9, 2013
  2. Tech. Ed

    delia is developing a storyboard for her movie about her autoniography. In this lesson you learned about the phases of creating an informative movie. In was phase of movie creation is delia? A. research Phase B. Planning Phase C.

    asked by Anonymous on March 16, 2015
  3. physics

    Both drawings show the same square, each of which has a side of length L = 0.86 m. An observer O is stationed at one corner of each square. Two loudspeakers are located at corners of the square, as in either drawing 1 or drawing

    asked by Anonymous on January 28, 2013
  4. physics help

    Imagine you are in an open field where two loudspeakers are set up and connected to the same amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s. If you are 3.00m from speaker A

    asked by Anonymous on April 19, 2010
  5. Physics Sound Waves

    A fire truck emitting a 450 Hz signal passes by a stationary detector. The difference in frequency measured by the detector is 58 Hz. If the speed of sound is 345 m/s, how fast is the fire truck moving? The answer should be 22 m/s

    asked by R on December 16, 2015
  1. physics

    Two identical loudspeakers that are 5.00 m apart and face toward each other are driven in phase by the same oscillator at a frequency of 875 Hz. The speed of sound in the room is 344 m/s. If you start out standing midway between

    asked by collen on August 8, 2012
  2. Physics Help, Please

    The figure below shows two speakers, A and B, which are emitting identical, synchronized (in-phase) sound waves at 240kHz. A person standing a point C hears a relatively loud sound. She then starts walking towards point D, and

    asked by Michael on November 12, 2012
  3. Physics

    a)What frequency is received by a person watching an oncoming ambulance moving at 120 km/h and emitting a steady 700 Hz sound from its siren? The speed of sound on this day is 345 m/s. b)What frequency does she receive after the

    asked by Caitlin on September 3, 2013
  4. Physics

    At a rock concert, the sound intensity 1.0 in front of the bank of loudspeakers is 0.10 . A fan is 30 from the loudspeakers. Her eardrums have a diameter of 8.4 .How much energy is transferred to each eardrum in one second?

    asked by Ness on December 13, 2010
  5. science

    Circle the term that does not belong in each of the following groupings. 1. HC1 secretion Acetyicholine Histamine Secretin Gastrin 2. Gastric emptying Slowed by fats Enterogastric reflex Solid foods 3. Cephalic phase Reflex phase

    asked by Katie on January 29, 2012
  6. physics

    Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. Speaker B is 12 m to the right of speaker A. The frequency of the waves emitted by each speaker is 686 Hz. Sound velocity is 343 m/s.

    asked by dani on January 17, 2016

You can view more similar questions or ask a new question.