Human hear only those molecular vibration between _ hertz (cycles per second).
Select one:
a. 5 and 5,000
b. 10 and 10,000
c. 1 and 1,000
d. 20 and 20,000
The correct answer and explanation is:
The correct answer is d. 20 and 20,000.
Humans are capable of hearing sound waves within a specific frequency range, typically from 20 Hz to 20,000 Hz (20 kHz). This range represents the frequencies that can be detected by the average human ear, with 20 Hz being the lowest frequency and 20,000 Hz the highest. Sound frequencies below 20 Hz are referred to as infrasound, and frequencies above 20,000 Hz are known as ultrasound. Both infrasound and ultrasound are outside the range of human hearing, though some animals, like dogs and bats, can detect ultrasound.
The sensitivity of the human ear varies with age and other factors. As people age, their ability to hear higher frequencies tends to decline. This is why many older adults may find it difficult to hear sounds above a certain frequency, such as those in the 15,000 Hz to 20,000 Hz range. Children and young adults typically have a broader frequency range.
The range of 20 Hz to 20,000 Hz is the standard for human hearing, and sound waves within this range are perceived as audible tones or noises. This frequency range is also important in areas like audio engineering, where speakers, microphones, and headphones are designed to reproduce sound within this audible range for clear and accurate sound reproduction. Furthermore, various animals use different frequency ranges for communication and navigation, with some species relying on frequencies beyond the human hearing threshold.
Understanding this range is essential in fields like acoustics, music, and technology to design devices that cater to human hearing capabilities.