Showing results 1-10 for “sound”

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  Sound Beats and Sine Waves

  Listen to and see interference patterns produced by sound waves with similar frequencies. Test your ability to distinguish and match sounds … as musicians do when they tune their instruments. Calculate the number of "sound beats" you will hear based on the frequency of each sound. [Note: Headphones are recommended for this Gizmo.]

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  Sight vs. Sound Reactions

  Measure your reaction time by clicking your mouse as quickly as possible when visual or auditory stimuli are presented. The … individual response times are recorded, as well as the mean and standard deviation for each test. A histogram of data shows overall trends in sight and sound response times. The type of test as well as the symbols and sounds used are chosen by the user.

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  Doppler Shift Advanced

  Derive an equation to calculate the frequency of an oncoming sound source and a receding sound source. Also, calculate the Doppler shift … that results from a moving observer and a stationary sound source. The source velocity, sound velocity, observer velocity and sound frequency can all be manipulated.

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  Doppler Shift

  Observe sound waves emitted from a moving vehicle. Measure the frequency of sound waves in front of and behind the vehicle as it … moves, illustrating the Doppler effect. The frequency of sound waves, speed of the source, and the speed of sound can all be manipulated. Motion of the vehicle can be linear, oscillating, or circular.

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  Hearing: Frequency and Volume

  Test your hearing range by listening to low-, medium-, and high-frequency sounds. Compare the relative loudness of sounds at each frequency … to create an equal-loudness curve. In a quiet room, measure your threshold of audibility for each frequency, and compare your results to others. The volume of each sound can be adjusted.

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  Refraction

  Determine the angle of refraction for a light beam moving from one medium to another. The angle of incidence and each index of refraction … can be varied. Using the tools provided, the angle of refraction can be measured, and the wavelength and frequency of the waves in each substance can be compared as well.

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  Energy Conversions

  Where does energy come from? How does energy get from one place to another? Find out how electrical current is generated and how living … things get energy to move and grow. Trace the path of energy and see how energy is converted from one form to another.

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  Longitudinal Waves

  Observe the propagation of longitudinal (compression) waves in a closed or open tube with evenly-spaced dividers. The strength and … frequency of the waves can be manipulated, or waves can be observed as individual pulses. Compare the movement of dividers to graphs of displacement, velocity, acceleration and pressure.

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  Phased Array

  Observe the wave fronts produced by four closely-spaced emitters. The spacing and phase shift of each wave source can be adjusted, as well … as the wave velocity. With all four sources you can observe a region of constructive interference that moves over time. The phased array has several real world applications such as radar and ultrasound.

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  Reaction Time 1 (Graphs and Statistics)

  Test your reaction time by catching a falling ruler or clicking a target. Create a data set of experiment results, and calculate the … range, mode, median, and mean of your data. Data can be displayed on a list, table, bar graph or dot plot. The Reaction Time 1 Student Exploration focuses on range, mode, and median.

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