Can audible sound, such as 9000 Hz, be used for pregancy probing?
The unborn child of the vertebrates that is present in the womb is called the fetus. The fetus is separated from the maternal circulation by the placental membrane that is selectively permeable to substances passing across it.
Hertz is the unit used to measure the frequency of sound waves. The sound waves below 20 Hertz are infrasonic whereas those above 20,000 Hertz are ultrasonic.
The ultrasonic sound is used to probe or detect pregnancy. The ultrasonic waves are used to listen to the heartbeat of the fetus and are conventional to produce a 2-dimensional (2-D) image of the fetus. The frequencies of ultrasonic waves are however higher than the upper audible limit of humans, which is usually between 20 Hertz - 20 kilo Hertz.
9000 Hertz is an audible sound and not an ultrasonic wave.
Thus it cannot be used for pregnancy probing.
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