- #Salt soundwaves portable#
- #Salt soundwaves series#
These are the natural frequencies of your model eardrum. The salt on the surface will vibrate more at these frequencies.
Record which frequencies cause the surface to resonate. Use the app to play different sound frequencies loudly while carefully observing the grains of salt on the surface. Position your model eardrum so that the plastic almost touches the phone’s speakers. Make sure that you choose an app that allows you to select the frequency of the tone that it generates. Download a free tone-generating app to your smartphone. How many natural frequencies does your eardrum model have? Use the procedure below to find out. Watch the Science Friday video “Patterns Written by Sound” to see a metal plate resonate at different natural frequencies in response to sound. When the frequency of sound waves precisely matches the natural frequency of a system, the maximum possible amplitude of vibration is achieved. These are called natural frequencies, and they’re determined by various properties of the system, such as its rigidity, size, and mass. Most systems-like your eardrum model-have a tendency to vibrate more easily and with greater amplitude at certain frequencies than at others. The frequency of sound is the number of wave cycles that are transmitted per second and is measured in a unit called “ Hertz” (Hz). *Optional – free tone generating app that produces tones of known frequency. Sugar, salt, dry ground coffee, flour, cornmeal or other sand-like substance. Plastic soda bottle or rigid plastic cup. #Salt soundwaves portable#
In this experiment, you will be able to visualize sound vibrations from speakers by building a portable eardrum model.
You can distinguish different sounds based on sound waves’ duration, wavelength, wave height (amplitude) and rate (frequency). Those vibrations are transmitted to your inner ear, where they are converted into information that your brain interprets as a sound. When you hear music coming from a speaker, you are actually “feeling” the sensation of air particles vibrating against your eardrum as the speaker’s sound waves are transferred through the air. Speakers produce sound waves by vibrating back and forth, compressing or “pushing” air particles. Sound can also travel between different media, which is why you can hear loud music coming from a room with the door closed.
#Salt soundwaves series#
You can picture sound waves as a series of nudges that cause particles in a medium to bump into one another in successive collisions. Sound is the transfer of energy in the form of waves through a substance, or medium, such as air, water, or a flexible solid.
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