Skip to content
As the distance between the listener and the source of sound increases, the perceived loudness of the sound decreases.The larynx lies in the throat between the pharynx and the trachea.Infrasonic sounds are sounds that have frequencies less than 20 Hz and are completely inaudible to the human ear.The frequency of each cup in a jal tarang is adjusted by filling it with an appropriate amount of water.Lightning is seen before thunder is heard because light travels significantly faster than sound through air.A plastic ruler produces a humming sound when one of its ends is held firmly on a table and the free end is flicked, causing it to vibrate rapidly.The frequency is the total number of oscillations made by a wave in a unit of time.When ultrasound waves encounter a defect in a metal block, they are reflected back and do not reach the ultrasound detector on the opposite side.Frogs and mammals produce sound by blowing air from their lungs through their vocal cords.Astronauts cannot hear each other directly because space is a vacuum and sound waves require a material medium to propagate, whereas light waves can travel through space without a medium.The two main parts of a tuning fork are its two U-shaped arms called prongs and a handle called the stem.A longitudinal wave is a wave in which the particles of the medium vibrate in the same direction as the propagation of the wave.When sound strikes a surface and reflects, the angle of incidence is equal to the angle of reflection.No, the loudness of sound does not depend upon the frequency of the vibrating particle.Mosquitoes and bees produce a buzzing sound by rapidly vibrating their wings.Dishwashers use ultrasonic vibrators to rapidly vibrate the water and detergent, which effectively removes grease and dirt from the utensils.The frequency of a wave is inversely proportional to its time period, mathematically written as Frequency = 1 / Time period.Women have a higher-pitched voice because their larynx is usually smaller than a man’s, resulting in tight and thin vocal cords that vibrate at a higher frequency.They are covered with sound-absorbing materials to prevent echoes, reduce unwanted reflections, and stop the transfer of sound to the external surroundings.The speed of sound in air is about 340 m/s, whereas the speed of light in air is vastly faster at 3 × 10^8 m/s.The two main structural parts of stringed instruments are a hollow body and stretched strings.One oscillation is the complete to and fro motion of the particles of a medium when one full wave is constituted.An echo requires a large reflector, a short duration original sound, and a minimum reflecting distance of 17 meters from the source.
Share
Explore
Answer key
Prepared by: learnloophq@gmail.com
Chapter: 06. Sound
Want to print your doc?
This is not the way.
This is not the way.
Try clicking the ··· in the right corner or using a keyboard shortcut (
CtrlP
) instead.