Hay un límite bien definido para el tipo de vibraciones de sonido que nuestros oídos pueden percibir.

Por lo tanto, inicialmente tenemos un límite inferior para la frecuencia de vibraciones que determina nuestro rango de audición y es de alrededor de 16 hertz o 16 vibraciones por segundo.

Este límite corresponde a los sonidos más bajos que podemos escuchar. No podemos escuchar las vibraciones que ocurren más lentamente que a una velocidad de 16 por segundo.

A medida que aumenta la frecuencia de los sonidos o las vibraciones, producirán diferentes sensaciones. Inicialmente se vuelven medios y luego agudos hasta que se alcanza el valor máximo que podemos percibir.

Para las personas comunes, el valor varía un poco, pero es de alrededor de 16 000 hertz.

Esta frecuencia corresponde al tono más alto que la mayoría de la gente puede escuchar.

En la figura 1 tenemos un gráfico que representa el rango audible, es decir, dónde están los sonidos de todas las frecuencias que podemos escuchar.

 


| Haga click en la imagen para ampliar |

 

 

Este rango se llama "espectro audible".

Por debajo del límite inferior tenemos el rango de infrasonido y por encima del límite superior de audición tenemos las vibraciones llamadas ultrasonido.

Hay animales como el murciélago, el delfín e incluso el perro que tienen un límite superior de audición por encima del nuestro.

¡Estos animales pueden escuchar ultrasonidos incluso a frecuencias que en algunos casos alcanzan los 50 000 Hz o 50 kilohertz!

 

 

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