Hearing Range of frequencies for humar ears if from 20 Hz to 20,000 Hz.
The Human hearing limits decays with age naturally. By the time you are over 30 your hearing may drop to a maximum rage of 0-15kHz. This is known as Presbycusis. There are many factors which cause this but the most common is hearing loss is caused by disorders of the inner ear or auditory nerve.
Being creatures of acute hearing sense, they particularly hate high intensity sounds that are beyond the hearing level of the human ear. Supersonic sound emitters can accomodate this.
in water dolphins have sharp hearing they use echolocation ........ in air both nocturnals bats and owl have sharp hearing owls uses tuff feathers to amplified sound bats uses ear holes and also the moths have sharp hearings too.... inland cats have best hearing they can rotate their ears 180 degrees maybe dog have sharp hearing compared to human but it can out race by cats ........
Hearing test are the most common tests involving the ears. These test determine whether someone has hearing loss and if so how much.
No
They
I am 50 years old and have no hearing in one ear and normal hearing in the other since birth. I wear no hearing aids and have never experienced any abnormal disabilities. I talk fine and my hearing is fine.
The human ear is capable of hearing sounds ranging from 20 to 20,000 cycles per second, or Hertz (Hz). These frequencies correspond to the audible range of human hearing.
The human ear muscles help in the process of hearing by adjusting the tension of the eardrum and the ossicles in the middle ear. This helps in amplifying and focusing sound waves, allowing them to be transmitted effectively to the inner ear for processing.
The auricle in the human ear helps to collect and direct sound waves into the ear canal, allowing for the process of hearing to occur.
The lower frequency limit of human hearing is generally considered to be around 20 Hz.At a speed of sound of 340 meters/sec, that frequency corresponds to a wavelength of(340/20) = 17 meters, in air.
I think it's not normal
When a sound reaches our ears,the ear drum vibrates for 0.1 of a second.This helps us to get a 'feeling of continuity'.This feature of human ear is called persistence of hearing.
The human ear can detect sounds as low as 0 decibels, which represents the threshold of hearing. At this level, the sound is just barely audible to the average human ear in ideal conditions.
The human ear can typically detect sound intensities ranging from about 0 dB (threshold of hearing) to 120-130 dB (threshold of pain). Sounds below the threshold of hearing are too faint for the ear to detect, while sounds above the threshold of pain can be physically uncomfortable or damaging to the hearing.
Because their hearing apparatus (ear) is not tuned to hear ultrasound.
The audible range is the lowest and the highest pitch sound we can hear. So for the human ear it would be 20Hz to 20,000Hz. More Information... The higher the sound the closer together each sound wave would be For even more explanation http://www.bbc.co.uk/schools/gcsebitesize/science/aqa_pre_2011/radiation/anintr oductiontowavesrev2.shtml