Sometimes, individuals exhibit classic signs of hearing loss: they do not hear well, or may only understand a portion of what is being said. They experience learning difficulties, particularly in environments with lots of background noise. When multiple people are talking, they lose focus and can’t follow the conversation.
What Is CAPD?
While all signs point to hear loss, in many cases, the cause is a behavioral disorder known as Central Auditory Processing Disorder (CAPD). An estimated five percent of school-age children suffer from CAPD; adults can also suffer from this condition. CAPD affects your ability to process information correctly due to a disconnect between what you are hearing and how your brain responds.
Most people with CAPD don’t actually have hearing loss. Studies have shown the majority are able to hear normally in quiet environments; the problem is in the way they process auditory information. Symptoms may range from mild to severe and include difficulty with any of the following:
- Hearing in noisy environments
- Following conversations
- Remembering spoken information
- Maintaining focus and attention
- Following directions
- Reading and spelling
- Processing nonverbal information
How Is CAPD Diagnosed?
Those with CAPD may become withdrawn, isolated and depressed. They often become disruptive and may take unnecessary risks or lash out at others. Because many of the behavioral issues closely mimic those associated with Attention Deficit Hyperactivity Disorder (ADHD) and other learning disabilities, an incorrect diagnosis is often made.
An audiologist can determine the exact nature of your issues through a routine hearing test, which will rule out any physical hearing problems by testing your ability to hear a range of frequencies. If no hearing loss is present, behavioral and electrophysiological testing is administered.
To encourage processing, assistive listening devices are often recommended.
Assistive Listening Devices
Assistive listening devices (ALDs) are portable systems that help individuals with hearing loss communicate more effectively. Unlike hearing aids, which amplify sounds, ALDs work by separating speech from background noise. This allows the person with the hearing impairment to hear more clearly.
Some ALDs are used in conjunction with hearing aids, while others work as standalone devices. ALDs are useful in a number of situations, primarily those involving distance, poor acoustics and noisy backgrounds.
There are several different types of ALDs available, for both large facilities and personal use. Some focus on amplifying speech, while others utilize computer programs to convert text to speech. Some of the different types include:
FM Systems
FM systems rely on radio signals to transmit amplified sounds directly to your hearing aid. They consist of a microphone, transmitter and receiver, and are used in a variety of public places such as classrooms, restaurants, movie theaters and churches.
The microphone is worn by the person speaking (or placed in close proximity to the sound source) and the signal is broadcast from the transmitter to the receiver, which is tuned to a specific frequency.
Personal Amplifiers
Personal amplifiers are essentially small FM systems used in smaller, more intimate settings where radio signals are less effective; they are often used when watching television, traveling by car or spending time outdoors.
The microphone is built directly into the unit, and is often directional, allowing you to aim it in the direction of the sound source in order to pick up the signal most effectively.
Infrared Systems
Infrared systems work on the same principle as FM systems, but use infrared light instead of radio waves to transmit sound. The transmitter converts sound signals into light and beams those to the receiver, which then translates the light signal back into sound.
An advantage to infrared systems is the fact that their signal is unable to pass through walls as it does with FM systems, eliminating competing broadcasts that might hamper the listener and preventing confidential information from being disseminated. They are particularly useful in courtrooms and large movie theaters.
Hearing Loops
Hearing loop, or induction loop, systems utilize electromagnetic energy to transmit sound directly to your hearing aid or cochlear implant. They consist of a sound source (public address systems are popular), an amplifier, a loop of wire and a receiver or telecoil (t-coil), a tiny wireless receiver built into many devices.
When you are in close proximity to the loop, you will receive clear sound free of background noise. Hearing loops can be connected to all types of audio sources, and are often set up in public facilities such as airports, churches and lecture halls.
Alerting Devices
Alerting devices hook up to telephones, alarm clocks, doorbells and other electronic devices. They alert you through a loud sound or flashing light, making you aware of an incoming phone call, a visitor at the door, etc.
Call Heuser Hearing Institute at (502) 584-3573 for more information or to schedule an appointment.