Description of the Ear

Description of the Ear

Ear parts:

1. Ouhter ear

2. Middle ear

3. In the Ear

4. Frequency

1.      Outher Ear

Ear is one of important tool, and the most beautiful structur in human body. The ear has theree parts it is external ear, middle ear, and internal ear. The part of external  ear is earlobe, hole ear, and ear drum.

Earlobe made up of cartilage covered by skin withthe fuction to direct sound into the bones in ear. In hole ear contains some hair that suppose one half inch with the fuction to avoid and other  foreign objects. In eardrum contains little membrance strached above the tip of this ear. This membrance will vibrate as respons at to variety of sounds.

         

2.      Middle Ear

Middle ear is air_filled cavity that connects the back of the nose through a tube into Eustachio that opens when you swallow  or yawn. And connects well with the inner ear.

Disease that often occurs in the middle ear is an infection, the germs trapped in the middle ear canal due to not working properly channel function it self is being pushed out through the channel Eustachian germs. This infection often occurs in infant / toddlers.

   Actual ear also clean it self. So people do not need clean too often. Because it is not good for the ears. Using ear claning cutton buds will only encourage germs go deeper. The recommended suggestions ear buds use cutton shaped spoon or bying ear drops, and ear candle theraphy. Try also to not use metal.

3.      IN THE EAR

There is a maze of bones or labirinosea. Is a series of cavities in the bone periosteum-Covered temples. Periosteal layer and labyrinth contains perilymph fluid membranasea, In which the position is located or to be deeper and have a liquid endolymph.

 In the inner ear, there is also Indra regolatory balance or vestibular organs, which are structurally located in the rear part of the maze. Vestibular organs from the structure of the utricle and sakulus also there are theree semi-circular or semicircular channel (channel coil). They or channel was responsible for managing the balance of the body that comes with hair cells that connect the balance portion of the auditory nerve.

What Actually Ear Function?

  Main function of the ear is to hear. This is possible becausein the cochlea of the inner ear that there are indeed functions as the sense of hearing. Besides hearing, ear also server as a balance to the body. In the inner ear there are three small whorls in wich there is fluid and thousands of microscopic hairs.

  If cochlear function to hear, then the small coil is working to help balance our bodies. Head when we move, the fluid in the coil will also move. It was also at the same time move the tiny hairs inside the coil, wich then deliver the massage to the brain. Based on the massage, then our brains later recognize the exact position where the muscles of the head and that should be the massage in order to help balance our body (the massage migration process occurs only within 1 second). 

Frequency Ear

Limit frequency sound that can be heard by the human ear is approximately from 20 Hz to 20 kHz in common with the amplitude variations the response curve. Sounds above 20 kHz is called ultrasonic and below 20 Hz is called infrasound.

The human ear is a complex organ consisting of small bones and cartilage. Sound waves coming through the outer ear and ear canal and pass to the eardrum (tympanic membrane). This makes the membrane undergo oscillation (wobble), causing compression and smoothing alternatives. This movement also work the other ear bones. Frequency is measured in terms of the oscillation of these bones, per second. Unit of frequency is the hertz. Typically, 1 Hz = 1 cycle / sec.

    In normal conditions, the average human ear can identify and distinguish the sound waves in the range of 20 Hz to 20 kHz (20,000 Hz). However, as you age, hearing ability at higher frequencies begin to decrease. Unlike the baby, the baby has a maximum capacity and diminishing hearing at the age of 8 years.

     Testing in the laboratory, the human hearing range is measured by avo meter that emits sound waves of various frequencies and calibrated headphones. In such ideal conditions, the human ear can mendegar sounds in frequencies between 12 Hz to 20 kHz.

     What about the hearing range between men and women?

    There are significant differences between men and women earshot. Discovered fact, that women are more sensitive to higher frequency range than the men, as well as with a lower freque Although, the frequency scale is the most common scale used to measure the ability of human hearing, but not infrequently also used unit pascal (Pa) or decibels (dB). However, the scale pascal is very complicated. It is expressed in Pa, where 1 Pa shows the distance traveled by the sound waves during the oscillation, which is equivalent to one-tenth of the diameter of a hydrogen atom.

     Sound waves in the human ear at a distance moves further away from it, thus making it difficult to measure the scale Pa. The softest sound that can be heard by the human ear is about 20 Pa. Simpler because the decibel scale is a logarithmic scale, which directly translates Pa scale. Where 0 dB = 20 Pa. Thus, 20 million Pa = 120 dB. Thus, the range of human hearing is 0 dB dB to 120 dB.ncy approximately equal in men and women. Range of human hearing varies widely from one person to another. So, to detect hearing loss, the better measure of earshot of someone using a scale that is referenced rather than using the standard normal scale.

     Tests can be performed using advanced diagnostic tools that hearing, which can accurately detect and diagnose the cause of hearing loss. A study says that the use of a headset and play music out loud every day for five years can cause permanent damage and problems ear disorder that can not be cured. Five years seemed like forever, but listening to music through the headset for a long time each day will have the same effect in a shorter time.

     How loud is too loud and the so-called impact the use of a headset on the ear? Right now, the maximum limit of human hearing is the sound of 100 decibels, but listening to music at 80 decibels continuously figures are also very dangerous.
               The human ear has limited the ability of the hearing based on the frequency of the sound is heard small. Frequency sound that can be heard by a normal human being is called to the audio frequency.

A.    Smallest limit: infrasonic frequency / infrasound = below 20 hz
Examples of creatures that can hear infrasonic frequencies are crickets, dolphins and bats / Flying-Fox, elephants, pigeons, etc..
B. Biggest limit: Frequency Ultrasonic / Ultrasonic = above 20,000 hz
Examples of creatures that can hear ultrasonic frequencies are bat / bats, cats, dogs, mice, grasshoppers, and so on.

B.     Some animals' ability to capture frequency sound waves:
- Bats use navigational frequency 100.000 hz to fly movement.
- Dogs can hear up to 40,000 hz
- Cats memeiliki hearing sensitivity from 100 to 60,000 hz.
- Kudanil 5hz use infrasonic frequencies to communicate between the members of a hippopotamus.
- Elephant able to capture the sound frequency of 1 s / d 20,000 hz.

       Of note, when you clean with a cotton bud into the ear canal not to. If it comes to the ear canal, most of the dirt will be pushed into even deeper part of the ear drum which then accumulate and harden. Moreover, if the type of dry and hard stools. "This is where a person will get in trouble because of the inner ear itch.

     If scraped-match itself, with cotton buds for example, could result in injury or eardrum skin, itchy skin like eczema or even going to purulent infection (otitis media) aka congek", dr. Hajar. Cases of ear disorders in infants because of the wrong way to clean ears is quite a lot going on in Indonesia. These infections often cause a fever.