Assistive Listening System: All that You Need to Know

The degree of a hearing disorder varies from mild to profound, and while people have the notion that only the mild or moderate cases can be treated with the help of ALSs (Assistive Listening Systems), it is not true. The ALS can take care of even the most profound hearing issues. In this blog post, our discussion will revolve around the ALS, its types, and how they affect people. To have a better understanding of this hearing system, you can also find an audiologist in your area.

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What is an ALS?

ALS can be compared to an amplifier that improves speech to noise ratio by separating the sound that people want to hear (such as speech), or from the less-wanted sounds such as background noise.

What are the types of ALS?

There are three major technologies that ALS utilizes. They are as follows:

1. FM Systems – Frequency Modulation, or FM for short uses radio broadcast technology and offer mobility and flexibility when used with portable transmitters. This system is often used in educational institutions to help students with a hearing disorder.

2. Infrared Systems – These systems work on the light-based technology. They are often used in situations such as court proceedings as they offer privacy benefits.

3. Inductive Loop Systems – These systems use an electromagnetic field for delivering sound. Users prefer inductive loop technology as it does not require body-worn receivers.

How does ALS help?

ALS helps increase the signal to noise ratio (in other words a volume increase) by 15 to 25 dB to help people with hearing disabilities to having the same level of understanding as people with normal hearing ability.

Some of the major issues that ALS addresses are below:

  • Minimize background noise
  • Reduce the distance effects between the sound sources, and
  • Overriding poor sounds such as echo.

These features make ALS useful in various settings such as home, places of entertainment, education, and employment. However, one important point to note here that in case hearing aids and cochlear implants users ALS work differently in different situations and have their performance limitations.


People often neglect their hearing issues until they get complicated. This is not the right approach, and therefore, it is advisable to take care of hearing issues in their initial stage itself. Simply put, find a good audiologist, who can diagnose and treat your hearing issues before it’s too late.


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