The hearing aid consists of a microphone, an amplifier and a speaker. The hearing aid picks up the sound, makes it stronger and sends it to the ear. Hearing aids can be classified as behind-the-ear or in-ear models.
Hearing aids consist of the following parts
• A microphone that captures sound waves and converts them into electrical signals
• A booster that amplifies these signals
• A speaker that converts amplified signals back into sound (called a receiver in hearing aids)
• An earmould (behind-the-ear models) that fits in the ear and through which sounds travel to the eardrum
• A plastic tube that transmits the sound from the hearing aid to the earmold (behind the ear models)
To get the most out of your hearing aid, it is recommended to use the following functions (if available on your hearing aid):
Microphone and Telecoil (M-MT-T switch)
Many hearing aids have an M-MT-T switch.
M: Microphone Position
For the normal position, set the switch to the M position.
T: Telecoil Position
If the user is in a place with a closed circuit system, he can listen to the desired sound or music clearly without ambient noise by switching to the T (telecoil) position. If your phone has a strong enough magnetic field, it is recommended to use telecoli for phone calls. Phone models that can also be used with telecoil are sold as audiological accessories. It can also amplify the sound of radios and televisions with a telecoil closed circuit connection.
MT: Microphone and Telecoil Position
In many hearing aids, it is possible to listen to the sound simultaneously via microphone and telecoil by turning the switch to MT (middle position). In both microphone and telecoil listening, the user can also talk to people during activities such as talking on the phone or watching television.
It is recommended that the hearing aid be turned off or muted when placing the hearing aid in the ear, in order to avoid the discomfort caused by the whistling sound due to feedback. After the hearing aid is placed, you can adjust the volume to the desired level. Many modern hearing aids adjust the volume automatically and there is often no manual volume control.
Don’t open? Off Switch
This switch may be in the form of a separate switch that opens the battery compartment, for example, or it may be an MTO switch (O = off).
This is where the battery is placed.
Hearing Aids and Their Uses
Behind the Ear Hearing Aids
Behind-the-ear hearing aids are placed behind the wearer’s ear and connected with a tube behind the ear.
In-Ear Hearing Aids
All electronics are built into the earmold. There are two basic design types: Concha model is made according to the shape of the outer ear; the canal pattern fits just inside the ear canal. In order to use in-ear models, the ear canal must be of a certain size and shape, and good dexterity and vision in terms of operation and maintenance are required. There is a red mark on the right hearing aid and a blue mark on the left hearing aid.
Fully In-Canal Hearing Aids
They are fairly small hearing aids with a plastic drawstring built into the battery compartment. The pull cord is used to remove the hearing aid from the ear. The red shell is used for the right ear full in-canal hearing aid, and the blue shell is used for the left ear full in-canal hearing aid. A whistling sound is heard when a full-channel hearing aid is turned on, indicating that the hearing aid and battery are working. The whistling sound stops when the hearing aid is placed in the ear correctly. Fully in-canal hearing aids turn off when the battery compartment is opened. The battery compartment should not be forced further back from its upright position.
Multi-Program Hearing Aids
Behind-the-ear and in-the-ear hearing aids have several hearing programs that can be adjusted to the individual’s needs, in order to reduce ambient noise and make, for example, listening to music more comfortable and enjoyable. These hearing aids can be used with or without a remote control.
Pocket Hearing Aids
It consists of a small box with a microphone and amplifier, a cable with a receiver, and an earmold. It has an on/off switch, an MT switch, a volume control and an NH switch. When the hearing aid is in the “H” position, low frequency (bass) sounds are reduced and high frequency (treble) sounds are increased. In this way, the intelligibility of speech can be increased in situations where it is masked by ambient noise. “N” is the normal position. Pocket-sized hearing aids are easier to use for people who have vision problems or find it difficult to use small behind-the-ear and in-the-ear hearing aids due to their size.
It mounts to the spectacle frame and connects to a standard behind-the-ear hearing aid. Operation is the same as other behind-the-ear hearing aids.
Caring for the Hearing Aid
• Wipe the hearing aid with a soft, dry cloth. Never use water or other liquids to clean the hearing aid.
• If the sound outlet is blocked due to earwax and moisture, clean the earwax with the special cleaning stick supplied with the hearing aid, use a small pump to remove the moisture.
• The hearing aid should be turned off when not in use. If you are not going to use the hearing aid for several days, remove the battery. Store the battery in a cool and dry environment and wipe the hearing aid clean.
• The hearing aid should not be exposed to extreme temperatures and humidity.
• Hearing aids should not be used while taking a shower, using a hair dryer, hair spray or other sprays, or while undergoing ultrasound therapy.