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How the Ear Works
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NASA Why? Files segment explaining how we hear sounds.
We're known as the Treehouse Detectives.
00:00:00
We're trying to get some sleep, but the neighborhood dogs are keeping us up.
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We want to know how our ears work.
00:00:05
That way we can figure out why the dogs keep barking.
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And how sound travels.
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If we know how sound travels, that might help us solve the problem.
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I think I can help you out. Let's move into the other room.
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What is all this stuff?
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This is equipment we use to test people's hearing.
00:00:20
Could you tell us how our ears work?
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Sure. The outer ear collects and concentrates the sound energy.
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Then this is channeled down the ear canal, and the eardrum vibrates, and so do the small bones within the ear.
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Then the sounds go through the cochlea, the hair cells bend,
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and then the impulses are sent up the auditory nerve into the brain, where they're decoded.
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Other sounds people can't hear?
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Sure, if they're above a certain frequency.
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The human ear can hear frequencies between 20 and 20,000 vibrations a second.
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Frequencies. Hmm. That might be a clue.
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Thanks for all your help.
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Sure. Bye.
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Bye, and good luck!
00:00:55
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- Idioma/s:
- Niveles educativos:
- ▼ Mostrar / ocultar niveles
- Nivel Intermedio
- Autor/es:
- NASA LaRC Office of Education
- Subido por:
- EducaMadrid
- Licencia:
- Reconocimiento - No comercial - Sin obra derivada
- Visualizaciones:
- 582
- Fecha:
- 28 de mayo de 2007 - 15:32
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 00′ 57″
- Relación de aspecto:
- 4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
- Resolución:
- 480x360 píxeles
- Tamaño:
- 5.84 MBytes