Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Telecommunications relay service wikipedia , lookup
Lip reading wikipedia , lookup
Sound from ultrasound wikipedia , lookup
Hearing loss wikipedia , lookup
Olivocochlear system wikipedia , lookup
Sound localization wikipedia , lookup
Noise-induced hearing loss wikipedia , lookup
Audiology and hearing health professionals in developed and developing countries wikipedia , lookup
Chapter 16.4 How You Hear Sound Pg. 558- 560 The Human Ear • The function of the ear is to gather sound waves and send or transmit, information about sound to your brain • Your ear has three main sections: 1. 2. 3. The Outer Ear The Middle Ear The Inner Ear • Each section has its own unique function The Outer Ear • The outer ear looks and functions like a funnel • The main function of the outer ear is to funnel sound waves • The components of the outer ear are the ear canal and eardrum The Outer Ear • The outer ear collects sound waves and directs them into a narrow region called the ear canal – The ear canal is a few centimeters long and ends at the eardrum • The eardrum is a small tightly stretched, drumlike membrane – Sound waves make your eardrum vibrate The Middle Ear • The middle ear is located behind the eardrum • The middle ear contains the three smallest bones in your body – The hammer • The hammer is attached to the eardrum and vibrates when the eardrum vibrates • The hammer transmits vibrations to the anvil first and the stirrups second – The anvil – The stirrup Inner Ear • The inner ear is separated from the middle ear by a membrane – When the stirrup vibrates it vibrates against the membrane and the vibrations pass into the cochlea • The Cochlea is a fluid-filled cavity shaped like a snail shell – The cochlea contains more than 10,000 tiny structures called hair cells The Inner Ear • The tiny hair cells have hairlike projections that float in the fluid of the cochlea – When vibrations move through the fluid the hair cells move, causing messages to be sent to the brain via the auditory nerve – The brain processes the messages and tells you what you’ve heard Hearing Loss • When hearing loss occurs a person may have difficulty hearing soft sounds or high-pitched sounds • There are many different causes of hearing loss such as, injury, infection, exposure to loud sounds, and aging Causes of Hearing Loss • Injury: Hearing loss can occur when the eardrum is damaged or punctured. – This is why it is dangerous to stick objects in your ears • Infection: Can cause damage to the delicate inner ear and cause permanent hearing loss Causes of Hearing Loss • Extended exposure to loud sounds can damage hair cells in the ear – The damaged hair cells will no longer be able to send signals to the brain – This type of damage can be prevented! • Aging: This is the most common form of hearing loss and it occurs gradually – As people get older their hair cells in the cochlea begin to die ( AND THEY CANNOT BE REPLACED) – People with this kind of hearing loss often have difficulty hearing high-frequency sounds Hearing Aids • For certain types of hearing loss, hearing aids can restore some ability to hear – Hearing aids amplify sounds entering the ear, and others can amplify specific frequencies that they person has lost the ability to hear – Hearing aids come in all different sizes Partner Project • Ask Your Partner what sound they hear throughout the day – List at least 15 sounds your partner hears – Ask them to rank the sounds they hear ask either painful, quiet, normal, loud – Then ask them to rate each sound as pleasant, neutral, or annoying – Also for each sound record the source, location, time of day, and time exposed to the sound – How are the sound ratings similar? How are they different? Sound Source Location Time of day Time of exposure Painful, quiet, normal, loud? Annoying, pleasant, neutral?