Hearing aid technology has been progressed rapidly for the past few years. Various manufacturers have provided us the vast variety of hearing aids equipped with modern technologies. These technological advancements within listening equipment make them even better than before. So now they become more accurate and clear. Today the innovation is focused on the type of hearing loss you are going through. Though you can now observe the variations and development in hearing machine technologies.
- Microphone: Receives auditory signals and converts them to electric signals.
- Processor: Makes the electrical signal louder than its original form.
- Receiver: Converts the amplified signal back to the acoustic signal and sends it to the ear canal.
- Battery: Powers the device to function all the features.
- Electronic Circuitry: Electric circuit inside hearing aid for its functioning.
In this article, we will make you aware of the different types and technologies available in the hearing machine industry. Then after we will help you learn the major differences between all innovation level so that you can choose the right one for you.
Digital Hearing Aids Technology
You may discover a technological part within the heap of the hearing devices, which is called processor. Today these processors are advance and more programmable than ever before. It allows the hearing care professional to precisely fine-tune the amplification characteristics. Also, it let them customize other special features in these modern devices based on your needs. The practitioner programs are also available in the hearing aids and are used by connecting them to a computer and detecting them with special software provided by the manufacturer.
Types of Ear Machines
Advance technology and better programming is the secret behind every modern hearing equipment. Thus they are now much improved and more customizable. Therefore these digital hearing machines are available in different styles and forms. Which will provide you the ease of use and quality of service. Because each style of modern hearing aid highly depends on your hearing needs and your wearing styles.
1. Behind the ear (BTE)
It will comfortably fit behind your outer ear. It will then transmit the sound through a tube. This sound will reach your ear, either by a dome that rests at your ear canal or by an earmold that sits inside your ear. Here the difference is only in the style of Behind The Ear (BTE) devices receiver but not in voice quality which you listen to.
2. In the ear (ITE)
This type of ear machine fits within the outer portion of the ear. Therefore this In The Ear (ITE) model will fill the visible gap of the outer ear or pinna. Due to its size is bigger so it comes in various color shades too. Which can easily match with your skin tone and it becomes unnoticeable?
3. The receiver in the Ear (RITE)
It is also called the Receiver In The Canal (RIC) hearing aid. Because it consists of a container called the main unit that sits behind your ear. But unlike behind the ear devices, the receiver piece goes inside the ear. Which makes it smaller than the BTE in size. Hence it is more comfortable and unlike old models less visible to others.
4. In the canal (ITC)
This type of ear machine can be fit in the ear canal. Thus only a smaller portion or faceplate of this In The Canal (ITC) listening device is visible in the outer ear. There is an extraction cord available on the outer surface of it to insert and pull out into the ear.
5. Invisible in the Canal (IIC)
These are the tiniest form that fit very deeply in the ear canal. Therefore this ear equipment is totally invisible from outside of the ear. Invisible In the Canal (IIC) hearing aid has an extraction cord that is used to put in and pull out the device.
6. Completely in the canal (CIC)
As the name suggests, these are Completely in the canal (CIC). Only the small portion of it (a tiny removal handle) shows outside the ear canal nothing else. So you can feel normal by wearing it because no one will able to know about it.
7. Contralateral Routing Of Signals (CROS)
CROS is useful when you have a hearing loss in one ear. Because It includes a microphone that is worn on the poorer hearing ear. So that it can take the sounds from that ear and send them to the normal ear. Thus in the resulting patient can listen normally.
8. Bone conduction
In this Bone conduction machine, the user wears a vibrating device on the bone behind the ear. This device converts the sound waves into vibrations and transfers them to the skull bone. The sound is transferred to the ear through this device is received by the cochlea of the inner ear.
Technological Features of Digital Hearing Aids
In the present time as technology is growing, the technological advancements in these hearing aids are also grown. It is transforming the complete structure of modern listening devices totally. Therefore they become more accurate, provide clean sound, reduce background noise, speech recognition, wireless streaming of call & music and many more features they are providing to their users now.
Now let us have a look at the various aspects of these modern digital hearing aids :
1. Digital signal processing
It converts the incoming sound waves into digital signal values for processing further. Then it converts them back into sound pressure waves that stimulate your auditory system.
2. Automatic Gain Control
It helps in making softer speech sounds audible. While controlling too much unwanted loud sounds are amplified. So that patient can hear the sounds which are slow or can recognize one sound in noise.
3. Noise reduction
It analyzes the incoming sound and separates the speech from a steady background noise. It will reduce the impulse sounds, soft sounds, and sounds of the shooting winds. Hence you can hear clear voice and conversations.
4. Adaptive feedback cancellation
The adaptive feedback cancellation system reduces feedback and background noise from the sound waves pick up from your nearby surroundings. Hence it produces clean disturbance-free sound in your ear.
5. Omni microphone
It emphasizes the sound waves coming from all the directions to you. Omnidirectional microphones equally catch the sound from the surrounding.
6. Directional microphones
It works for a particular direction thus it only emphasizes the sound which is coming from the front. Also, it de-emphasizes the sounds coming from the sides and behind.
7. Automatic and adaptive directional microphones
These automatic and adaptive directional microphone features allow the hearing aids to switch from an Omni microphone setting to a directional microphone setting automatically and dynamically.
8. Listening Memory Program
It is a software part of the hearing aid. Its functionality provides a setting that is specially designed for a particular listening situation.
9. Wireless connectivity
Latest Hearing Aids Technology
As the technology level increases, it raises the functioning level of the components of hearing aids. As technological development demands the variations in the system as well as functions of those devices
The innovation of hearing machines can be categorized in basic or advanced. Let’s discuss both in the detail.
1. Basic Hearing Aid Technology
In basic technology, manual adjustment is needed like pushing a button on the aids to reduce noise coming from behind, volume control can be adjusted. This type has limited adjustments. They are less automated than advanced technology.
The following features are usually included in basic innovation –
The Channel separates the sound signal into distinct sections for processing. It allows customization of hearing aid prescription all pitches. The number of channels implies a greater ability to customize the frequency response. The more channels in a hearing machine, the greater the flexibility in programming.
Digital Noise Reduction
As the name suggests, it reduces the noise in the signal if any. It analyses the signal and determines if the signal contains unwanted noise. And finally, it reduces it and makes it less annoying to the listener. This technology is effective and preferred by most of the hearing aid wearers.
Directional Microphone Systems
It is based on a direction and gives preference to the sounds which are coming from the front of the wearer and reduces the sound from all other directions. This hearing aid technology improves speech understanding in background noise. The hearing devices with directional microphone systems will provide you with the best satisfaction than the one without directional microphone systems.
Impulse Noise Reduction
It helps in improving listening comfort like digital noise reduction. It smoothes the quick impulsive noises like typing on the keyboard, dishes rattling, car keys rattling, etc.
A telecoil also called an induction coil. It’s nothing more than a tiny coil of wire around a core that will induce an electric current in the coil in the presence of a changing magnetic field. It has wireless features that pick up the electromagnetic signal from the older telephone or looped room, whose speaker was driven by powerful magnets. As a result, a user is able to hear the telephone better using a hearing aid. Telecoils are not available in a few smaller models due to space limitations.
Feedback Management System
It reduces the occurrence of a whistling sound in your hearing aid. To improve the feedback mechanism, Basic feedback management systems may reduce overall amplification whereas Advanced feedback management systems do not affect overall amplification. It improves the signal to noise ratio by bypassing the microphone and directly entering the processor. It is commonly available in public places, theatres, and public places.
Using FM Compatibility, you can connect your hearing machines wirelessly with FM systems. Sometimes, this connection is made via a special attachment called boot. It improves the signal to noise ratio. It is commonly used with children in educational settings.
2. Advanced Hearing Machine Technology
In this level, the features of hearing devices became more advanced and automatic than in basic. Advanced technology provides more benefits to the user. For example, instead of using two channels to separate sound for processing, a hearing aid with advanced technology may have eight or more channels. This splits the signal into even smaller frequency bands and therefore offers a higher resolution of signal processing.
Features included in Advanced technologies are as follows :
Using Bluetooth hearing aids, you can wirelessly connect to mobile phones, mp3, and other Bluetooth devices. It eliminates feedback or interference and improves the signal to noise ratios like telecoil and FM Compatibility as the signal bypasses the microphone and directly enters the hearing machine’s processor. Hence making it comfortable for the wearer to hear sounds.
It stores data about listening environments and user preferences like volume control. Hearing healthcare professionals analyze this data to improve the fitting. Your audiologist may use this valuable information to further customize your hearing aid fitting.
Wind noise reduction
It is helpful for people who spend their time outside. Their work is to reduce the noise of wind passing through the microphone. It is an advanced technology that detects the impact of the wind blowing across the hearing machine microphones and avoids or reduces the amplification of it.
As we said that advanced technology has automated features so here wearer can set log settings for a certain environment and then these changes begin automatically according to the sound environment. These technologies provide a preference for learning.
This can be used for the synchronous operation of hearing aid or to pass auditory signals from one aid to the other. Basically, two devices communicate with each other. In binaural processing, a pair of devices communicate wirelessly with each other. This innovation mimics the brain’s ability to process information coming from both ears and helps reduce manual adjustments. It enhances your experience of binaural hearing.
Difference B/W Analog and Digital Hearing Aids
The electronic circuitry of various hearing machines like analog and digital differs even their type and style is the same.
Comparative chart showing components of Digital and Analog devices :
|Analog to digital converter||NO||YES|
|Digital signal processor||NO||YES|
|Digital to Analog converter||NO||YES|
Under processing technology comes audio processing. Audio processing is of two types- analog and digital. Hearing machines can be analog or digital. Let’s see what are their advantages.
Analog Hearing Aids
An analog amplifies all sounds whether it is sound or noise. Some are programmable. Microchip stores these program settings information. You can set it according to various listening environments. This makes it user-friendly and comfortable.
- Sometimes they are more powerful than a digital hearing device.
- Generally, it cost less than a digital.
- Sometimes people who want to use their hearing machine for a long time prefer analog.
Digital Hearing Aids
The latest hearing technology involves Digital Hearing Aids. They have all the features that an analog has. The difference is that they convert sound waves to digital signals and produces the exact duplicate of the sound rather than just amplifying it.
- Most adjustable and flexible.
- Highly programmable for different listening environments.
- ‘Noise reduction algorithm’ helps for reducing background noise.
Choose the Right Level of Hearing Aid Technology
There are mainly six differences that you need to look out before choosing the right level of technology for you.
Customizability refers to the range of amplification (or frequency) that a hearing device can perform. If it has a low number of channels, you would get less precision in hearing. Unlikely in advanced technology, there can be 20+ channels and a high number of channels help in a fine precision of hearing and this also allows your device to be well programmed up to your prescription.
The ability of a device to perform well in a noisy background makes it different. Most of the hearing aids have the ability of binaural synchronization i.e. they communicate back & forth between themselves. This helps in hearing background noise and improving hearing conditions as it has four microphones instead of two microphones on both ears which are communicating with each other and hence helps in finding a better listening landscape in a noisy background. The premium level of technology can do this more precisely than the basic one which may not perform well in a noisy background.
Ease of use
The basic level of technology may have less number of programs and may not help you with better listening in a noisy background. But advanced technology has a large number of programs which can help you to listen better. Moreover, you have to adjust settings for hearing in different environments but advanced innovation does it automatically for you. It automatically turns the settings according to the environment you are in.
Comfort in sound
When you find yourself in a kind of environment where a harsh sound is present, a hearing machine with advancement helps you to get rid of those sounds by blocking them as they have advanced digital features. In contrast, a basic technology may not have such features and as a result, you’ll find it difficult to hear in a harsh sound background.
If you want connectivity with devices like telephone and Bluetooth devices and also want a potential rechargeability, you must go with the upper level of technology. Most of the brands do not allow connectivity at a basic level.
If you want an advanced level of technology rather than a basic level, you have to spend more money. You have to spend almost Rs 69,084 more for a premium level of technology than for a basic level. But it’s worth it if you want advanced features in your hearing aid and wants a better hearing. But if you are someone who stays at home all the time and watches TV and has less conversation with people then you will be ok with the basic level of technology.
We hope that, once you finish reading this article, you will have enough knowledge of various technology available in the industry and you will be able to decide which style & type is right for you. If you need any advice or help related to any hearing problem, book an appointment or dial our toll-free number 1800-121-4408.