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Hearing Aids/Instruments

At ACMC Audiology, we understand that the words "hearing aid" can be intimidating. We will help you understand just what hearing instruments are and what they can and cannot do. In our opinion, a well informed patient will have the best chance for success with amplification and will have the best opportunity to improve their hearing.

Fitting hearing instruments is intricate work. Our goal at ACMC Audiology is to provide our patients with a hearing instrument that fits their individual needs. One size does not fit all. A well fit hearing aid should make soft sounds audible and keep loud sounds loud but not uncomfortable. Everything should not sound the same. A whisper and a conversational voice are quite different.

Hearing Aid Exam includes:

  • Consultation regarding type, style, and features of hearing instrument appropriate for hearing loss
  • Ear impression
  • Instruction and orientation in the use and care of hearing instrument
  • Follow-up visits to assess the benefit of the hearing instrument; may include adjustment of hearing instrument and probe microphone measurements
  • Hearing instrument service including earmold tubing replacement, cleaning and general function check of hearing instrument during the warranty period

Hearing Aid/Instrument Technology and Features/Options

All hearing aids are digital.
A digital hearing aid analyzes, processes, and reproduces sound waves millions of times per second in order to deliver sound with very little distortion. By changing the sound into a digital format, amplification becomes a mathematical task. These aids are very flexible and adjustable. Digital hearing aids are set based on your hearing levels and are custom fit to match your hearing loss. If your hearing changes with time, they can be reset to match your new levels.

There are three different levels of digital hearing instruments:

  • Advanced level - These aids have the most advanced digital processing. They automatically adjust to different environments and change they way they process sound accordingly. An advanced hearing aid adjusts loudness, multiple microphones and noise reduction automatically. They communicate side to side, eliminating the need to adjust both aids manually.
  • Middle level - These aids have advanced digital processing. A middle level hearing aid activates multiple microphones and noise reduction automatically. A volume control is used to change the loudness of the sound around you. They communicate side to side, eliminating the need to adjust both aids manually.
  • Entry level - These aids take advantage of the adjustability and clarity of digital signal processing. A volume control is used to change the loudness of the sound around you and a push button is used to switch between programs and directional microphones.

Hearing Instrument Styles


Behind the Ear

Full Shell

Half Shell

Completely in the Canal

Program or Memory
This is a set of instructions that tell the hearing aid how to adjust to sound. Different programs can be designed for different situations, like quiet listening, noisy listening or the telephone. Basic hearing instruments use a button to change programs, while mid level and advanced aids change automatically.

Multiple microphones
This is one of the most effective noise reduction features available on hearing instruments today. Like the "zoom" feature on a camera, using two microphones, one aimed toward the front and one toward the rear, the wearer can focus on sound in the front of them while the rear microphone reduces the level of the sound behind them. When not in a noisy environment, the hearing instrument can be set back into "wide angle" (omni directional) mode for better all around hearing.

Digital Noise Control
Algorithms are the computer program instructions or calculations that are used to modify or adjust sound signals. Some advanced algorithms are capable of detecting the differences between some noises and speech. Wind noise can sometimes be limited as well.

Telecoil
This receiver picks up electromagnetic signals transmitted from telephones for better reception without feedback. It can also pick up these signals in large rooms (classrooms, churches, etc) that have been wired with an induction loop system. The telecoil is most commonly activated automatically when a phone is in range, but can also be activated using a push button or a remote control.

CROS microphones
This special microphone is used when you have very poor hearing in one ear and better hearing in the other. The CROS picks up the sounds from the poor ear and sends it across to the better ear. This signal is sent either through a wire that connects the two instruments, or can be done wirelessly using a radio signal.

Hearing Aid/Instrument Dispensing Policy

  • Hearing instruments are paid for in full at the time they are delivered to the patient, unless other arrangements have been made with ACMC's Business Office.
  • All hearing instruments have a warranty issued by the manufacturer for a period of at least one year. Optional extended warranties are available for an additional charge.
  • A forty-five (45) day trial/return period exists on the hearing instrument. A refund policy applies to the price of the hearing instrument, as previously listed, less a restocking fee.
  • Insurance may or may not cover hearing instrument costs. We recommend checking with your insurance company for coverage.