Three different vibrating objects produce three types of sounds X, Y and Z. The sounds X and Y cannot be heard by a man having normal range of hearing but sound Z can be heard easily. The sound X can be heard by a bat whereas the sound Y can be heard by a rhinoceros. What type of sounds are X, Y and Z?
Answers
X is ultrasonic sound
Y is infrasonic sound
Z is not mentioned in the question but I think it is normal sound having the frequency range from 20hz to 20,000hz
Hope it helps...
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X - ultrasonic, Y - infrasonic, Z - sonic
Explanation:
Humans are capable of hearing sound waves of frequency between 20 Hz and 20,000 Hz only. This is called the Sonic waves. These audio freqencies are called the audible range. The sound above this range is called ultra sound and below it is called infra sound. Humans are not capable of hearing both the ultra sound and infra sound waves.
However, many animals can hear infrasonic sound like whales, elephants, rhinos, hippos, giraffes, alligators, squids, cuttlefish, octopus, pigeons, etc.
Bats can hear ultrasonic frequencies. They can detect frequencies beyond 100 kHz, possibly even up to 200 kHz. Bats use a variety of (ultrasonic ranging) echolocation techniques to detect their prey.
X is ultrasonic frequencies, Y is infrasonic frequencies heard by rhinoceros, and Z is sonic waves with audible range of humans.