Until recently, I mentioned the relationship between human and sound, but here I would like to briefly explain how animals such as dogs and cats recognize sound!
First, we will introduce the mechanism of animals' ears.
Here I will introduce dogs and cats!
If you would like from the conclusion, ears and structure of our human beings are almost the same.
Let's take a look at the structure of the two animals' ears also serves as a review!
Please see the figure below. ↓ ↓ ↓
external ear
It is the part that is visible to our eyes.
pinna
Usually we call "ear", It refers to the flickering part of the ear. There is an auricular ointment and it has a function to change the shape of the ear.
Auricularus muscle
Move in the direction you wish to move the pinna.
External ear canal
It is divided into a vertical part and a horizontal part at the path of sound (vibrated air) . Between the two there are L-shaped curves called bends.
middle ear
It refers to the inner part of the eardrum.
Middle ear cavity
It refers to the part on the cavity behind the eardrum . Also called the tympanic chamber.
Ossicular
It consists of three small bones of muscle bone, kidney bone, stirrup bone. It is responsible for amplifying the vibration of the air transmitted to the eardrum and transmitting it to the inner ear .
Eustachian tube
It connects to the nasal cavity and pharynx with a duct extending from the middle ear cavity . Many pilus are growing and their work keeps them clean in the middle ear!
inner ear
It refers to the part further in the middle ear
Cochlea
Although the cochlea was originally a snail, This name was given because it resembles a snail swirl . Vibrations that pass through the ossicular bone are connected to the auditory nerve via this and the information spreads in the brain .
Vestibule / semicircular canal
Mainly Organ that is responsible for balance sense .
The main difference is that the ear is on the side of the head because the ear is different from the human ear, while the ear canal is nearly in line with the human ear,
As dogs and cats have their ears on top of their heads, the ear canal is divided into two parts, "vertical ear canal" and "horizontal ear canal" I guess.
Next, I will cover the range of sounds that the animals hear!
Frequencies include high frequencies and low frequencies, and to what extent they can hear varies depending on the type of animals.
In this time, let's see how much the range of dogs and cats we took up earlier, mammals flying in the sky can hear, compared with human ones!
Let's compare each animal easily!
In the case of a dog
Than peopleThe range of audible sound is wide.
In the case of a cat
Than peopleIt seems to be able to hear the high Hz sound.
In the case of a bat
Hear also high Hz of the sound than the highest sound that can be what we hear!
In this way, the world of sounds heard by animals is various!
