... sound is present; it is often referred to as ringing in the ears." (American Tinnitus Association) Statistics from the Head and Neck Center, P.C. indicate that there are nearly 36 million people affected by tinnitus; 7 million are affected so severely that they cannot lead normal lives. Tinnitus occurrence and characteristics vary from person to person. The sound may be continuous or fluctuating ... "abnormalities in blood vessels around the outside of the ear or by muscle spasms, which may sound like clicks or crackling inside the middle ear". (American Academy of Otolaryngology) Other...

• Word Count: 3300
• Approx Pages: 13
• Has Bibliography
• Grade Level: High School

... sound is present; it is often referred to as ringing in the ears." (American Tinnitus Association) Statistics from the Head and Neck Center, P.C. indicate that there are nearly 36 million people affected by tinnitus; 7 million are affected so severely that they cannot lead normal lives. Tinnitus occurrence and characteristics vary from person to person. The sound may be continuous or fluctuating ... "abnormalities in blood vessels around the outside of the ear or by muscle spasms, which may sound like clicks or crackling inside the middle ear". (American Academy of Otolaryngology) Other...

• Word Count: 3300
• Approx Pages: 13
• Has Bibliography
• Grade Level: High School

... of vibrations per second. The closer the waves are the higher the frequency. With a higher frequency the pitch of a sound is raised. People become hearing impaired when the inner ear is damaged. There are two types of hearing loss that have sub categories. Conductive hearing loss is caused ... using 22 electrodes whereas the real human ear relies on 3500 hair cells that transform soundwaves into tuned sound. The cochlear implant is essentially tone-deaf. A real ear can differentiate between pitch and timbre, tones and semitones, but a cochlear implant cannot. This will also cause sound t...

• Word Count: 1095
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School