JSIERT

Hearing Impairment

Hearing ImpairmentTotal hearing impairment, which is rare, is usually from birth itself. Partial disability is generally the result of a disease, injury or age. Children withimpaired hearing need special care. By learning sign language, such children can communicate effectively. Because speech develops as the direct result of hearing, a child with a hearing loss may …

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What are the Harms of Noise
Pollution?

Do you know that presence of excessive noise in the surroundings may cause many health related problems. Lack of sleep, hypertension (high blood pressure), anxiety and many more health disorders may be caused by noise pollution. A person who is exposed to a loud sound continuously may get temporary or even permanent impairment of hearing.

What is an ultrasonic sound wave ?

Sound waves with frequencies higher than 20000 Hz of human hearing are called ultrasound. This is used in many different fields such as navigation, medicine, imaging, cleaning, mixing, communication, testing etc. Even in nature, bats use this particular technique for the location of prey and obstacles.

What is Ultrasonic sound wave and its detection .

Some animals can hear sounds of frequencies higher than 20,000 Hz. that is called Ultrasonic sound wave .Dogs have this ability. The police use high frequency whistles which dogs can hear but humans cannot.The ultrasound equipment, familiar to us for investigating and tracking many medical problems, works at frequencies higher than 20,000 Hz.