Indian love story।village love story।।Love story of dev and radhi

 ### Radhi and Dev: A Love Story from 1986 It is 1986. Two villages, Dhana and Matata, although close in proximity, are entirely different. Dhana is a flat village with fertile land and roads connecting it to ten neighboring villages. In contrast, Matata is a hilly village with rugged terrain and less flat land, making it quite isolated. **Birth and Tradition:** Radhi is born in Dhana, known for its expansive fields and vibrant community life. Dev is born in Matata, surrounded by rolling hills and challenging paths. According to traditional customs, when Radhi and Dev were five years old, their families arranged their engagement, a promise of future union. This engagement was celebrated with traditional rituals, but the children were unaware of the significant bond that had been created. **Growing Up Separately:** As the years go by, Radhi and Dev live separate lives in their respective villages. Radhi enjoys the bustling life in Dhana, participating in village festivals, helping w...
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Range of hearing

 


Normal human ears can hear only those waves whose frequency lies between 20Hz and 20,000Hz. The waves having frequency between 20 Hz and rs 20,000 Hz are called sound waves.Thus, the audible range of frequency is 20 Hz to 20,000 Hz. The waves having frequency less than 20 Hz and greater than 20,000 Hz cannot be heard by human ears. Children under the age of 5 and some animals, such as dogs are able to hear up to 25 KHz (1KHz =1000Hz). As people grow older their ears become less sensitive to higher waves of frequency. The waves of frequency less than 20 Hz are called infrasonic sound or infrasound. The infrasonic waves are produced by large vibrating bodies.   If we are able to hear the infrasound we can hear the vibrations of a pendulum just as we hear the vibrations of the wings of a bee.



 Rhinoceroses communicate using infrasound of frequency as low as 5 Hz. Some other animals like whale and elephants also produce waves or sound in the infrasound range. It has been observed that some animals behaviour become unusual before earthquake. Earthquakes produce low-frequency infrasound before the main shock waves begin which possibly alert the animals. The waves of frequency greater than 20,000 Hz are known as ultrasonic sound or ultrasound. Dolphins, bats and porpoises have the ability to produce ultrasound.Moths of certain families possess very sensitive hearing equipment. These moths have the capacity to hear the high frequency squeaks of the bat and know when a bat is flying nearby, and are able to escape capture. Rats also play games by producing ultrasound.


Hearing aid




 A Hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. It is an electric battery operated device. The hearing aid receives sound through the microphone. The microphone changes the sound waves to electrical signals. These electrical signals are amplified by an amplifier. The amplified electrical signals are given to a speaker of the hearing aid. The speaker changes the amplified electrical signal to sound and sends to the ear for clear hearing.


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