Garlic is the edible bulb from a plant in the lily family. It has been used as both a medicine and a spice for thousands of years. Garlicâs most common folk or traditional uses as a. are for high cholesterol, heart disease, and high blood pressure.arlic is the edible bulb from a plant in the lily family. It has been used as both a medicine and a spice for thousands of years. Garlicâs most common folk or traditional uses as a. are for high cholesterol, heart disease, and high blood pressure.
Each Hz represents one wave cycle per second. If our ears are working perfectly, we can hear frequencies from about 20 Hz (for example, the largest organ pipe) to 20,000 Hz (for example, some dog whistles). As we move away from the source of a sound, the pressure drops approximately in proportion to the distance. As the distance from the sound source doubles in length, the sound pressure level is reduced by half. The height and depth of sound waves is referred to as amplitude or loudness. As the amplitude increases, the volume increases. Our ears can detect sound over a very wide range of amplitudes, which are often measured and described in terms of decibels (dB). The softest sound humans can hear is approximately 0 dB.
The basic components of a sound wave are frequency, wavelength and amplitude. Frequency is the number of pressure waves that pass by a reference point per unit time and is measured in Hertz (Hz) or cycles per second.To the human ear, an increase in frequency is perceived as a higher pitched sound, while a decrease in frequency is perceived as a lower pitched sound.ore specifically, the wavelength of a sound equals the speed of sound in either air or water divided by the frequency of the wave. Therefore, a 20 Hz sound wave is 75 m long in the water (1500/20 = 75) whereas a 20 Hz sound wave in air is only 17 m long (340/20 = 17) in air.