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Our sound frequency videos were created in a colourful and lively manner, hoping to impart some educational facts to children. We hope to let children knows how sound is related to frequencies. And how this frequencies affects us. Sound is created by a vibrating object of a pressure and sound wave. Sound waves travel thru air, water and solid objects. Sinusoidal wave of human audio spectrum starts at 20Hz and ending at 20kHz. Most of us have different hearing threshold and it changes with our age. Frequency below 1kHz If you cannot hear any sound at full volume, it may be your audio equipment is incapable of playing low frequency. You may increase your volume moderately but don’t forget to lower it later to prevent any excessive damage to your ears. Frequency between 10kHz - 20kHz If you cannot hear any sound in between, do not attempt to increase your audio equipment volume for your own safety of your ear. We hope you enjoyed our videos and learnt some interesting facts. The video was deliberatel