Physics: Wavelength, Amplitude, Frequency.

• The wavelength is the distance between two consecutive peaks or troughs.
• Frequency is the number of waves passing a point per second. It is measured in Hertz (Hz).
• Amplitude: the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
• Crest refers to the highest point in the wave, which is the point where the wave is at its greatest height.
• A medium is needed for sound to travel through, such as air or water.
• Infrasound refers to the lowest frequency sound that can be detected by the human ear.
• Ultrasound refers to the use of sound waves that are too high frequency to be heard by the human ear
• When the frequency of the wavelength increases, the color of the light changes from red to violet.
• The speed of sound in air is 331 m/s.
• The speed of sound in air is 1500 m/s.
• Speed of sound in iron is 5500 m/s.
• When two identical tuning fork are placed together with one of them being hit, the other will vibrate as it is resonating.
• When two non-identical tuning fork are struck, the sound waves are reflected back and forth between them.
• When one of the two non-identical tuning fork is struck, nothing happens to the other tuning fork.
• The higher the speed limit, the higher the frequency of sound is. This means that it will be louder.
• Acoustic panels and absorptive ceiling tiles are used to reduce the echo which can cause hearing loss if the decibels is over 85 dBA.
• To reduce the chances with hearing loss, you can wear noise-cancelling headphones, move away from loud noises and use sound absorbent materials in the room.