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Which of the following frequencies can be heard by the human ear -- a. 0.1 Hz b. 10 Hz c. 1000 Hz or d. 100000 Hz?
Wiki User
∙ 8y ago
1000 Hz. The others are outside the range of human hearing. You can feel 10 Hz but not hear it. C. 1,000 Hz
Wiki User
∙ 8y ago
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What is sonar frequency?
The frequencies on which sonar is used vary widely. Human hearing is usually cited as ranging as from 20 cycles per second (Hertz) to 20,000 cycles per second. There are many sonars that use frequencies in the 20 to 20,000 Hertz range. In general, the sonars that are used for short range underwater applications operate on a slightly higher frequency than those that are designed to look over long distances. But there are a lot of sonars which use frequencies far outside the range of human hearing. Medical imaging is the most popular use of sonar. The range of frequencies used by these devices range from 2 million cycles per second to 18 million cycles per second. These frequencies are far above what humans can hear.
Does the average human blink more or less than 100000 times a day?
The average human blinks about 15-20 times per minute, which adds up to approximately 14,400-19,200 times per day. Therefore, the average human blinks significantly less than 100,000 times a day.
A truck explodes downtown during rush hour near a government building There are more than 100 casualties Many more victims are being treated for minor injuries In the days following the explosion?
It would be investigated as possible terrorism because it was near a government building in the days following.
What is the earth's frequency?
From the following page:http://en.wikipedia.org/wiki/User:Oldspammer/Robert_C._Beckwe have the following information: Robert C. Beck performed his own research on electro-stimulation of the healing process and found that the human body has numerous very specific frequencies at which production of different endorphins, beta-endorphins, catecholamines, enkephalins, dynorphins, proteins, and stem cells were triggered.Beck used an HP spectrum analyzer and attached it to instrumentation amplifiers that were connected to human subjects in order to measure brain wave activity both with and without external stimulation. Beck claimed that the brain appeared to have a high-Q factor of about 3000 for frequency selectivity. Via his own research and that of others, Beck determined that about 250 different frequencies were key in triggering the body to produce its own healing chemicals. Beck studied about 150 different brain wave stimulation devices, and their effects experimentally. He studied the 'executive chimp' study (involving stressed animals). He designed the Brain Tuner black box electrode device to produce these frequencies simultaneously.Through further research on various people claiming mystical powers, Robert C. Beck found that these people for brief instances of a few seconds at a time generated brain waves in frequency between alpha and theta waves, in sympathy with the 7.83 Hertz-earth resonance frequency (see ELF, Binaural beats, Schumann resonance). He found that nearly none of people claiming mystical powers were without this phenomenon, and that the ones without it were probably faking their mystic abilities. From the following page http://en.wikipedia.org/wiki/Schumann_resonance we get the following information:The Schumann resonance (SR) is a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth surface and the ionosphere. This global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonance occurs because the space between the surface of the Earth and the conductive ionosphere acts as a waveguide. The limited dimensions of the Earth cause this waveguide to act as a resonant cavity for electromagnetic waves in the ELF band. The cavity is naturally excited by energy from lightning strikes. Schumann resonances are observed in the power spectra of the natural electromagnetic background noise, as separate peaks at extremely low frequencies (ELF) around 8, 14, 20, 26 and 32 Hz.
What coninent is the population ''zero''?
Antarctica basically has no permanent human population.Antarctica basically has no permanent human population.Antarctica basically has no permanent human population.Antarctica basically has no permanent human population.
Can radiation be heard?
No, radiation cannot be heard. Radiation is a form of energy that travels in the form of waves or particles, but these waves are at frequencies outside the range of human hearing.
If subjected to sound frequencies of 25000 to 100000 cycles per second would be least affected?
Humans would be least affected by sound frequencies in that range, as our hearing is most sensitive to frequencies between 20 Hz and 20,000 Hz. Frequencies outside of this range are typically considered ultrasonic and are not audible to the average human ear.
Which frequencies of wave in the air can be heard as an audible sound by the human ear?
The audible range of frequencies for the human ear is typically between 20 Hz to 20,000 Hz. Frequencies below 20 Hz are infrasound, and frequencies above 20,000 Hz are ultrasound, both of which are generally not audible to humans.
What are the highest and lowest frequencies that can be heard in air?
The human ear can typically hear frequencies ranging from about 20 Hz to 20,000 Hz. Below 20 Hz are infrasound frequencies, and above 20,000 Hz are ultrasound frequencies, which are generally not audible to humans.
What is the audible sound?
The audible sound is the range of frequencies that are detectable by the human ear, typically between 20 Hz and 20,000 Hz. These frequencies are perceived as sound waves and can vary in pitch and volume.
Describe infrasonic and ultrasonic waves and explain why humans can not hear them?
Infrasonic waves have frequencies below the range of human hearing (below 20 Hz), while ultrasonic waves have frequencies above the range of human hearing (above 20 kHz). Humans cannot hear them because the structures of the inner ear are not sensitive to these extreme frequencies. Our auditory system is tuned to detect sounds within a specific frequency range that is optimal for our survival and communication needs.
What in db are the frequencies a human can hear?
In a typical human auditory system, the frequencies that can be heard range from about 20 Hz to 20,000 Hz. Sounds below 20 Hz are considered infrasound, while sounds above 20,000 Hz are considered ultrasound, which are generally inaudible to humans.
What range of frequencies can be heard by a human?
Humans can generally hear frequencies ranging from about 20 Hz to 20,000 Hz, with the ability to hear higher frequencies decreasing with age. This range is known as the audible spectrum and varies slightly from person to person.
What are sound waves with frequencies above the normal human range of hearing?
Sound waves with frequencies above the normal human range of hearing are called ultrasoundUltrasoundUltrasonic for frequencies higher than a human can hear, and infrasonic for those frequencies below the human threshold of hearing.
Sound waves with frequencies above 20000 hz?
Sound waves with frequencies above 20,000 Hz are considered ultrasonic. These frequencies are above the upper limit of human hearing and are commonly used in applications like medical imaging, cleaning, and animal communication.
What is something human cnt hear?
Some sounds that are at certain frequencies cannot be heard by a human ear. Some such sounds are a dog whistle, certain whale songs and dolphin and bat echolocation.
What is the minimum frequency the human ear can hear?
The human ear can generally detect sounds with frequencies as low as 20 Hz. Below this frequency, the sound may be felt rather than heard.
