#### Type of Interference and intensity level problems

1. There are two speakers at the front of the room. Each is outputting a 250Hz pure tone. For each of the following situations, will you hear constructive interference (a loud noise) or destructive interference (soft or no noise). Lambda represents the wavelength of the 250Hz tone. Choices: Construc...

#### Sounds and Loudness

How loud is too loud? When is a sound too loud? What can be done about sounds/noises that are too loud for you? If you have some ideas I am very happy to learn from you.

#### Frequency and wavelength of emitted sound wave

39. A violin string 17.8 cm long and fixed at both ends oscillates in it's n = 5 mode. The speed of waves on the string is 206 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave? 51. The A string of a violin is a little too t...

#### Sound Waves: Standing Waves & Beats

1. Organ pipe A, with both ends open, has a fundamental frequency of 300 Hz. The third harmonic of organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are (a) pipe A and (b) pipe B? 2. A tuning fork of unknown frequency makes 3.00 beats per second wi...

#### Sound Waves: Beats, Beat Frequency

Each of three tuning forks, A, B, and C, has a slightly different frequency. When A and B are sounded together, they produce a beat frequency of 2 Hz. When A and C are sounded together, they produce a beat frequency of 5 Hz. What is the smallest possible beat frequency when B and C are sounded toget...

#### Waves and sounds

As the drawing shows, the length of a guitar string is 0.628 m. The frets are numbered for convenience. A performer can play a musical scale on a single string, because the spacing between the frets is designed according to the following rule: When the string is pushed against any fret j, the fundam...

#### Frequency is measured for speakers

Two speakers separated by a distance of D = 4.30 m emit sound with opposite phase. A person listens from a location d1 = 2.90 m in front of one of the speakers. What is the lowest (nonzero) frequency that gives destructive interference in this case? .....Hz?

#### Tenstion in the stirng(Wave and sounds)

As the drawing shows, the length of a guitar string is 0.628 m. The frets are numbered for convenience. A performer can play a musical scale on a single string, because the spacing between the frets is designed according to the following rule: When the string is pushed against any fret j, the fundam...

#### Physics - Wave Motion

A steel cable with total length 30m and mass 100kg is connected to two poles. The tension in the cable is 3000N, and the wind makes the cable vibrate with a frequency of 2Hz. Calculate the wavelength of the resulting wave on the cable.

#### fundamental frequency of a pipe

The fundamental frequency of a pipe that is open at both ends is 592 Hz. a). How long is this pipe? b). If one end is now closed, find the wavelength of the new fundamental. c). If one end is now closed, find the frequency of the new fundamental.

#### Two Guitarists - Beats Wavelengths

Two guitarists attempt to play the same note of wavelength 6.49 cm at the same time, but one of the instruments is slightly out of tune and plays a note of wavelength 6.52 cm instead. What is the frequency of the beat these musicians hear when they play together?

#### Linear Superposition and Interference Phenomena

The location of the speakers in this problem is what's throwing me off. Two speakers, one directly behind the other, are each generating a 245-Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front ...

#### Sound Waves and Motion Properties

1) Sound waves travel through an aluminum bar at a speed of 1400 m/s. If the frequency of the sound wave is 880 Hz, what is the distance between crests on a sound wave traveling through aluminum? 2) An airplane flies horizontally at a constant speed, piloted by rescuers who are searching for a ...

#### Sound waves travelling in air and solid

A man strikes a long aluminum rod at one end. Another man at the other end with his ear close to the rod, hears the sound of the blow twice (once through the air and once through the rod), with a 332 ms interval between them. How long is the rod?

#### Speed of Sound and Doppler Effect

The speed of sound in air is about 660miles/hour. A passenger train approaches an unguarded railroad crossing at a constant speed of 60 miles/hour and the locomotive sounds its horn which has a frequency of 400 Hz. [A]. What frequency does a listener standing near the crossing hear? [B]. If...

#### Tuning a Guitar with Beats

A 440.0 Hz tuning fork is sounded together with an out-of-tune guitar string, and a beat frequency of 3 Hz is heard. When the string is tightened, the frequency is heard to decrease. What was the original frequency of the guitar string?

#### Diffraction Horn Loudspeaker

Sound exits a diffraction horn loudspeaker through a rectangular opening like a small doorway. A person is sitting at an angle off to the side of a diffraction horn that has a width D of 0.060 m. The speed of sound is 343 m/s. This individual does not hear a sound wave that has a frequency of 810...

#### Sound travelling time through multiple mediums

An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water and a slender metal handrail. The speeds of sound in air, water, and the handrail are 343, 1482, and 5040 m/s. The sound travels a distance of 125 m in each med...

#### distance between the speaker and observer

A loudspeaker is placed between two observers who are 120 m apart, along the line connecting them. If one observer records a sound level of 60.0 dB and the other records a sound level of 90 dB, how far is the speaker from each observer? (Hint: use the equation given in problem 17.28, page 538 which ...

#### Guitar String Frequency

A 440.0-Hz tuning fork is sounded together with an out-of-tune guitar and a beat frequency of 3 Hz is heard. When the string is tightened, the frequency at which it vibrates increases, and the beat frequency is heard to decrease. What was the original frequency of the string?