Audible And Inaudible Sounds
Chapter Name : Sound |
Sub Topic Code : 101_08_13_06_01 |
Topic Name : Audible And Inaudible Sounds |
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Sub Topic Name : Audible Sound |
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Introduction
The audible frequency range of sounds is different for different animals. So it is, for humans. sound of frequency lesser than the minimum and greater than the maximum are not audible.
Pre-Requisites:
Sound, Vibrations
Activity:
Research using the internet about the range of frequencies other animals can hear.
Real Life Question:
How are dogs able to hear the sound which we cannot?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Audible Range (Human) | The frequency of sound which can be detected by human ear i.e.20Hz - 20KHz |
Learning aids / Gadgets
| Gadgets | How it can be used |
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Real life uses :
Hearing aids used for deaf people are designed to work in this limited frequency range.
Places to visit :
Visit a doctor and try to understand more about the sounds that our ear can hear.
Practical examples around us
| Examples | Explainations |
|---|---|
| Ultra sounds cannot be heard by humans | Ultra sound corresponds to a frequency of over 20kHz. These are beyond the human hearing range. Hence cannot be detected by us. |
What you learn in Theory:
The range of frequencies audible to human ear