Hair Cells – Sensory cells of the inner ear, which are topped with hair–like structures (stereocilia), which transform the mechanical energy of sound waves into nerve impulses.
Hard of Hearing – A term used to describe hearing–impaired individuals with mild to severe / profound hearing impairment who are not deaf.
Hearing – A sense, series of events in which sound waves in the air are converted to electrical signals, which are sent as nerve impulses to the brain, where they are interpreted as sound.
Hearing Aid – A battery–powered electronic device that brings amplified sound to the ear. A hearing aid usually consists of a microphone, amplifier, and receiver. Learn more about hearing aids.
Hearing Aid Dispenser – A person licensed by the state to dispense hearing aids, but who does not have university training in audiology.
Hearing Disorder – A general term used to describe any disruption in the normal auditory process.
Hearing Loss – was originally defined in medical terms before the development of modern audiology. Today, professionals tend to use the consistent, research-based terminology of audiology. The following numerical values are based on the average of the hearing loss at three frequencies: 500 Hz, 1,000 Hz, and 2,000 Hz, in the better ear without amplification. The numerical values for the seven categories vary among professionals.
- Normal Hearing (-10 dB to 15 dB)
- Slight loss (16 dB to 25 dB)
- Mild loss (26 dB to 30 dB)
- Moderate (31 dB to 50 dB)
- Moderate/Severe (51 dB to 70 dB)
- Severe loss (71 dB to 90 dB)
- Profound loss (91 dB or more)
Hereditary Hearing Impairment – Inherited hearing loss that is passed down through the family.
Home birth – For centuries giving birth at home was the norm. By the 1900’s increasing numbers of women started having their babies at hospitals. As our understanding of anatomy, modern medicine, the mechanics’ of childbirth, and technology have significantly increased, more and more women have been willing to consider the option of having a home birth. This option involves the participation of trained midwives or nurse-midwives in cases of low-risk, healthy pregnancies. As interest in home birth increases, the number of studies and amount of data will continue to grow to provide us with a greater understanding of the related risks and benefits. (American Pregnancy Association)