Key Takeaways:
- An FM system is a helpful option for those who struggle to hear in background noise.
- FM systems come in two categories: individually worn systems and soundfield-based systems.
- Auracast is a new technology that will be implemented in the coming years to provide increased audibility in more public settings.
If you have hearing loss, using an FM system can significantly improve hearing ability in various settings. An FM system assists with speech understanding in adverse listening environments.
FM systems can be used at school, work, and other public settings where background noise is loud or distracting. Below, we’ll take a closer look at how FM systems work, who they’re for, and what options are available.
What is an FM system?
First things first, what exactly is an FM system? An FM system stands for frequency modulation system, and it is made of two parts: a remote microphone and a receiver (another word for speaker).
A presenter—for example, a teacher in a classroom—wears a remote microphone. Next, the receiver picks up and receives an amplified version of the speech signal. This wireless assistive technology enhances the speech signal similarly to cutting through background noise or shortening the speaker's distance to create a clearer and more easily understood speech signal.
Many people with hearing loss have difficulty hearing in background noise or challenging listening environments. Distance, noise, and reverberation can make it harder to hear a person’s speech. The idea of an FM system is to increase the volume of the speech signal in relation to the competing background noise.
There is another version called a DM system that works the same as an FM system but utilizes a digital signal rather than a radio signal. The result is a clearer signal without interference that radio signals (or static sounds) can produce. Note: Both FM and DM systems are often referred to as FM systems.
FAQs
Where can I use one?
There are a variety of options for when and where you can use an FM system. These include meetings, at the dinner table, in the car, at school, in lectures, in auditoriums, when walking, or even at home. For example, some of my patients struggle to hear their family when out at noisy restaurants. An FM system works well there because the family member can clip the microphone on their shirt, making the conversation much easier to follow.
Looking for tips about when to use this technology at home for your child? Check out this handy guide.
Are FM systems an alternative to hearing aids?
No—while they do amplify sound similarly to hearing aids, FM systems serve different purposes and should not be seen as replacements. Hearing aids provide sound amplification directly into the user's ear, whereas an FM system uses external microphones that broadcast audio signals directly into receivers worn by those with hearing loss.
What about built-in systems like Auracast?
Auracast is a new, emerging infrastructure that will utilize the new Bluetooth LE protocol to allow people to receive audio directly to their hearing aids or headphones. This technology is not yet widely available but is on the horizon in the coming years. Once Auracast is readily available, it will be the easiest way to pick up audio signals without needing an intermediary device. Currently, FM systems and telecoil options still provide the best way to receive clearer audio.
How much do FM systems cost?
Prices vary greatly depending on the type of product and technology. For example, an inexpensive option like a Pocket Talker can help a senior participate in a conversation with a family member and generally cost between $100 to $200. Generally speaking, prices range from around several hundred to several thousand dollars for an FM system. Consult with your hearing care provider about your best options for your needs and your budget.
Conclusion
FM systems are helpful for anyone who has difficulty understanding speech due to background noise or distance from the speaker—especially those with hearing loss. There are numerous types available, ranging from individually-worn units to room-based units depending on your individual needs, setting, and preferred usage scenario. An audiologist should be able to provide guidance when deciding which option is best for you—so reach out if necessary. With this knowledge under your belt, all that’s left is finding the right product.
