How does temperature affect frequency of sound waves?
There seems to be an open question to why the pitch of a woodwind instrument (flute, sax, trumpet, pipe organ, etc.) goes down as the temperature decreases, and vice versa. Sound's frequency is independent of temperature, while its speed is directly proportional to temperature. So the pitch cannot go down with the temperature in a simple manner (e.g., does the frequency of someone clapping go down when the air temperature decreases?). It is actually because the sound waves travel more slowly inside a musical instrument, which leads to lower rate at which the standing wave is excited, hence lower pitch. In other words, shortened wavelength corresponds to more standing waves inside the instrument per unit time (i.e., imagine the slower traveling waves getting squashed together more closely), but how often the standing wave oscillates back and forth like a vibrating string, which ultimately produces the sound and the pitch we hear, is affected by the speed of sound and thus the temperature (i.e., how often those wave fronts add up constructively over time).
Is velocity of sound dependent on wavelength?
The velocity of sound is only dependent on the elastic properties and inertia properties of the medium. It is independent of the wavelength.velocity of a longitudinal wave = root ( bulk modulus of elasticity / density of the fluid)
Does the speed of sound depend on its frequency, amplitude, and phase?
The speed of sound in an ideal gas depends only on its temperature and composition. The speed has a weak dependence on frequency and pressure in ordinary air, deviating slightly from ideal behavior.In common everyday speech, speed of soundrefers to the speed of sound waves in air. However, the speed of sound varies from substance to substance: sound travels most slowly in gases; it travels faster in liquids; and faster still in solidssource: WikipediaThe pitch of a sound is dictated by the frequency of the sound wave, while the loudness is dictated by the amplitude. When a drum is beaten, the air particles around the drum skin vibrate in the form of a compression wave.The phase speed of a sound wave is dependent on the wave amplitude
When a sound wave goes from one medium to another, the frequency of it doesn't change but amplitude, wavelength and speed changes, why?
When a sound wave goes from one medium to another, the frequency of it doesn't change but amplitude, wavelength and speed changes, why?Suppose I have a tube and the bottom is filled with water and floating on top of it, there is some turpentine (paint thinner). The speed of sound in the water is about 1500 m/s. In the turps, it is about 1200 m/s. Here’s a cartoon of what it looks like:I’ve drawn the surfaces wiggly just so you can distinguish them. The idea is that they are actually flat.Now you smack your hand onto the top surface of the turps. A wave will move down through the turps are 1200 m/s. When that wave moves into the water, the pressure wave moves at 1500 m/s. I’m ignoring all the reflections. I’m just talking about a single pulse of pressure. Smack the surface and the wave (simple jump in pressure) moves down through one liquid and then the next.Suppose a friend puts their ear on the bottom of the tube. You smack the top and a short time later, they hear the pulse at the bottom. You could easily calculate the time delay if you knew the two depths of liquids.Now suppose you smack the water five times in a row. You smack evenly once a second. Five smacks in a row, smack, smack, smack, smack, smack. What will your friend hear? Five smacks in a row, each separated by a second. The whole thing will simply be delayed by the time it takes for the sound to get from the top of the turps and down to the bottom of the water. You with me so far?Five smacks per second. That’s a frequency. The source of that is your hand. The receiver - your friend’s ear - receives five smacks per second. The exact same frequency. The frequency has to be the same because it’s the same sound pulses moving down through the two liquids.Now replace your hand by a loudspeaker. Drive it at say 200 Hz. The speaker is moving down and up shoving the water (smacking the water) 200 times a second. Just like your hand, but faster. A microphone at the bottom is going to hear 200 Hz. It will hear the 200 smacks per second. It doesn’t matter that we think of that as a single continuous sound, the frequency still has to be the same.That’s why the frequency has to be the same when a sound wave moves from one medium to the next. For some reason this is the bit that people don’t understand intuitively. But once you get that understood, the rest is fairly easy. You just apply the equation that relates speed of sound, frequency and wavelength.
Regardless of the frequency of the wave, all sound?
A. travels with decreasing amount of energy through a given medium. That is why sound is not heard if the distance is long. B. travels at the same speed through a given medium. Speed depends on the density and elastic property of the medium and since these properties do not change except with temperature, speed remains the same generally. C. has the same wavelength. Since frequency and speed is the same in a given medium wavelength also remains the same D. moves with decreasing amount of amplitude. The energy depends on the amplitude. Both amplitude and energy decreases with distance traveled. ======================================...
Why doesn't frequency affect wave speed?
If you increase the frequency and reduce the wavelength, the speed remains constant. That is what light does. But if you have waves with orbital angular momentum, if you increase their wavefront velocity , both the frequency of the wave and the wavelength increase.[math]f=\frac{v}{\lambda}[/math]Increasing the velocity keeping f constant, increases [math]\lambda[/math]. But for light we know v is always constant c. This works for other waves like sound waves too. For water waves, velocity depends on the amplitude, but with fixed amplitude, it works the same way.
When the frequency of a sound wave increases, what is the effect on the wavelength period and amplitude?
Since the wavelength is inversely proportional to the frequency, the wavelength will decrease when the frequency increases, resulting in higher tones.The amplitude is perceived as the loudness of sound. As sound propagates through a medium (e.g. through air) the amplitude decreases faster with higher frequencies because higher frequencies are better attenuated than lower ones. This phenomenon you can easily hear by yourself when you move away from a sound source, e.g. a music concert in open air: the higher tones (high frequencies) will become much less audible than the lower tones, meaning that de higher frequencies are better muffled than the lower ones.
When a tuning fork is struck, it produces sound waves of wavelength 114 cm which travel at 343 m/s through air?
When a tuning fork is struck, it produces sound waves of wavelength 114 cm which travel at 343 m/s through air. What is the frequency of the tuning fork? Choose one answer. a. 300 Hz b. 392.16 Hz c. 3.33 x 10-3 Hz d. 3.01 Hz In general, the speed of sound depends on the state and temperature of the medium such that: Choose one answer. a. speed in liquid > speed in solid > speed in hot gas > speed in cold gas b. speed in solid > speed in liquid > speed in cold gas > speed in hot gas c. speed in solid > speed in liquid > speed in hot gas > speed in cold gas d. speed in cold gas > speed in hot gas > speed in liquid > speed in solid If the frequency of the sound waves detected by the detector is exactly equal to the frequency of the sound waves emitted by the source, then we can conclude that: Choose one answer. a. The detector and source are at rest. b. The detector and source are moving with the same velocity. c. The detector and source are moving with opposite velocities. d. The detector and source are either at rest or moving with same velocity. When the frequency of a force applied to a system matches the natural frequency of vibration of the system, it starts vibrating with a: Choose one answer. a. large wavelength b. large amplitude c. high frequency d. large time-period