The Human Ear Can Detect What Frequency of Vibrations?
Sound and ultrasound - College
Sound is caused by the vibration of particles, but not all vibrations can be heard every bit sound. Mutual ideas about sound come from the limited range of vibrations that man ears can detect.
Sound waves
Sound waves are longitudinal waves . They crusade particles to vibrate parallel to the direction of moving ridge travel. The vibrations can travel through solids, liquids or gases, by a series of compressions and rarefactions .
The speed of audio depends on the medium through which it is travelling. When travelling through air, the speed of audio is nigh 330 metres per second (m/s). Sound cannot travel through a vacuum because there are no particles to conduct the vibrations.
The ear
The human being ear detects sound. Sound waves enter the ear culvert and crusade the eardrum to vibrate. Three small bones transmit these vibrations to the cochlea. This produces electrical signals which pass through the auditory nerve to the brain, where they are interpreted as sound.
Backdrop of audio
The frequency of a audio wave is related to the pitch that is heard:
- high frequency sound waves are loftier pitched
- low frequency audio waves are low pitched
The amplitude of a sound wave is related to the volume of the audio:
- high amplitude audio waves are loud
- low aamplitude sound waves are quiet
Oscilloscope traces showing the following sounds:
- quiet, low pitch sound
- loud, depression pitch sound
- loud, high pitch sound
The cochlea is simply stimulated past a limited range of frequencies. This means that humans can only hear certain frequencies. The range of normal human hearing is 20 Hertz (Hz) to xx,000 Hz (20 kHz).
Source: https://www.bbc.co.uk/bitesize/guides/zgyk6yc/revision/1
0 Response to "The Human Ear Can Detect What Frequency of Vibrations?"
Post a Comment