Hearing Access Technology

Hearing access technology covers a wide range of tools and strategies that help people who are deaf or hard of hearing access speech, audio, environmental sounds, and important alerts in daily life. This includes far more than hearing aids: assistive listening systems, captioning and real-time text, telephone and video relay services, visual and vibrating alerts, remote microphone systems, and other communication technologies all play a role. This page provides a general educational overview. It does not diagnose hearing loss, does not recommend a specific hearing aid or device for any individual, and does not substitute for an evaluation by an audiologist or other qualified professional.

Hearing Aids, OTC Hearing Aids, and PSAPs

Understanding hearing access technology starts with a few basic categories that are often confused with one another.

Hearing aids are regulated medical devices intended to compensate for hearing impairment. Traditional (prescription) hearing aids are available to people of any age and any degree of hearing loss, including severe or profound loss, and in some states require purchase through a licensed hearing care provider.

Over-the-counter (OTC) hearing aids are a category the U.S. Food and Drug Administration (FDA) created through a rule that took effect in October 2022. OTC hearing aids are still regulated medical devices, but they can be purchased directly by consumers without an exam, a prescription, or a professional fitting. The FDA has stated that OTC hearing aids are intended for adults 18 and older who perceive they have mild to moderate hearing loss. The FDA also identifies situations where someone should see a hearing health professional instead of using an OTC device on their own  for example, sudden or rapidly worsening hearing loss, hearing loss in only one ear, ear pain or drainage, dizziness, or a visible ear deformity. Because OTC devices have a limited maximum output, the FDA notes that people with severe or profound hearing loss are generally better served by consulting a professional.

Personal sound amplification products (PSAPs) are a separate, non-medical category. The FDA is explicit that PSAPs are intended for people who do not have hearing impairment — for example, to amplify sound for activities like birdwatching or listening to a distant lecturer — and that PSAPs are not intended to compensate for hearing loss. A product that claims to treat or compensate for hearing impairment is, by definition, not a PSAP.

This page does not compare specific hearing aid or PSAP products, and it does not tell readers which category is right for them. That determination depends on an individual's hearing status and is best made with the involvement of a hearing health professional when hearing loss is suspected.

Assistive Listening Systems

Assistive listening systems are designed to improve access to a specific sound source — such as a speaker, a performance, or a service counter — by transmitting sound more directly to a listener than relying on room acoustics alone. This can reduce the effects of distance, background noise, and reverberation on speech understanding.

Common categories include induction loop (hearing loop) systems, FM systems, digital modulation (DM) systems, and infrared systems. Each transmits audio from a microphone or sound source to a receiver in a different way, and each has different practical tradeoffs around interference, privacy, line-of-sight requirements, and compatibility with personal hearing devices. No single technology is universally best; venues and individuals choose based on the setting, the equipment already in use, and the needs of the people involved.

Hearing Loops and Telecoils

A hearing loop (induction loop) system transmits an audio signal through a magnetic field created by a loop of wire, typically installed around a room, a section of seating, or a service counter. A compatible receiving device picks up that signal directly.

Many hearing aids and cochlear implants include a small internal component called a telecoil (sometimes called a T-coil) that can receive a hearing loop's magnetic signal directly, without an external receiver. This can be useful in public settings such as theaters, houses of worship, and transit or service counters that have installed a loop system.

Telecoil compatibility is not universal. Not every hearing aid or cochlear implant includes a telecoil, and where a venue's assistive listening system does include a required minimum number of hearing-aid-compatible receivers, that requirement generally applies to a defined portion of the total receivers rather than all of them (see "Public Spaces and Assistive Listening Access" below). Someone who wants to use a telecoil should confirm with their hearing care provider whether their own device includes one and how to activate it.

REMOTE MICROPHONE SYSTEMS

A remote microphone system uses a small microphone, worn or held by a speaker, that transmits that person's voice wirelessly to a receiver or compatible hearing device used by a listener. Because the microphone stays close to the speaker's mouth, the received signal can remain clear even as the distance between speaker and listener increases, or as background noise and room echo increase.

Remote microphone systems are used in a range of settings, including classrooms, meetings, medical appointments, and group activities, wherever hearing a specific speaker clearly — rather than the general soundscape of a room — is the goal. As with other assistive listening technology, whether and how a remote microphone system is used depends on individual needs, the environment, and, in some cases, an educational or workplace accommodation process (see the education and employment sections below).

CAPTIONING

Captioning displays spoken dialogue and other audio information as text, supporting access to video and audio content for people who are deaf or hard of hearing, and for many other viewers as well — for example, in noisy environments or when audio quality is poor.

Closed captions can be turned on or off by the viewer. Open captions are visible to everyone watching and cannot be turned off; because there is no single detailed federal regulatory definition distinguishing "open" from "closed" captioning as a formal legal category, this page describes the practical difference in viewing experience rather than citing a specific regulation for the distinction.

Captions can be created in different ways. Live captioning is produced in real time during an event or broadcast, while captions for prerecorded content can be prepared in advance and reviewed for accuracy. Automatic captioning, generated by speech recognition software, has become widely available on video platforms and communication tools, but its accuracy can vary depending on factors such as background noise, audio quality, accents, and specialized vocabulary. Automatically generated captions may be less consistently accurate than professionally prepared or human-produced captions, particularly for live or unpredictable speech, though the degree of difference depends on the specific tools and conditions involved.

CART, ASR, and Real-Time Text

Several related but distinct technologies convert speech to text in real time, and it is easy to confuse them.

Communication Access Realtime Translation (CART) is provided by a trained captioner or stenographer using specialized equipment and software to produce a real-time, word-for-word text transcript of spoken content. Because a trained person is producing the transcript, CART is often used in settings where accuracy and completeness are especially important, such as classrooms, legal proceedings, or formal meetings.

Automatic speech recognition (ASR) software can also generate live captions or transcripts without a human captioner. ASR has become far more accessible and widely available, but — as noted above — its accuracy can vary with audio conditions, speaker accents, and technical vocabulary, so it may not be a substitute for CART in every situation.

Real-Time Text (RTT) is a specific telecommunications feature, not a general term for live captioning. RTT allows text to be transmitted character-by-character during a phone call, as it is typed, rather than being sent only after a full message is composed (as with traditional text messaging). The Federal Communications Commission (FCC) has supported RTT as a modern alternative to older TTY (teletypewriter) technology on wireless networks. As of this writing, wireless carriers and device manufacturers are still required to support TTY compatibility as well; the FCC has an open, unresolved proceeding considering whether and when that TTY backward-compatibility requirement might eventually be phased out, and no such decision has been made.

Telephone and Relay Access

People who are deaf, hard of hearing, or have speech disabilities have several options for accessible telephone communication, most of which fall under the FCC's Telecommunications Relay Service (TRS) framework — a set of FCC-mandated services designed to make phone communication accessible, available in every U.S. state and territory.

Video Relay Service (VRS) allows a person who uses American Sign Language to communicate with a hearing person over the phone through a video connection to a sign language interpreter, who relays the conversation.

Internet Protocol Captioned Telephone Service (IP CTS) allows a person with hearing loss to speak directly into the phone and read captions of what the other party says, generated with the help of a communications assistant and speech recognition technology.

Traditional TTY-based relay allows a person using a text telephone device to type messages that a communications assistant reads aloud to the other party, and vice versa.

Real-Time Text (RTT), described above, offers an additional, more modern way to send text during a call on supporting wireless networks and devices.

These services are federally supported specifically to enable phone communication access, and eligibility, registration, and specific service features can change over time as FCC rules evolve; anyone interested in a specific relay service should check current information directly from their phone or relay provider.

VISUAL AND VIBRATING ALERTS

Many everyday notifications are designed primarily around sound — a doorbell, a phone ringing, a timer going off, a baby monitor, a smoke alarm. Visual alerting devices (such as flashing lights) and vibrating alerting devices (such as a vibrating pad or wearable) can provide the same information through a different channel, either as a replacement for or in addition to an audible signal.

Many households and individuals use a combination of alerting approaches — for example, a flashing light for a doorbell alongside a vibrating alert for a phone — matched to the specific notification and the environment where it needs to be noticed.

Fire, Smoke, and Emergency Alerting

Fire and smoke alarm systems that combine audible alarms with visual alerts (such as strobe lights) and vibrating or tactile alerts (such as a bed shaker placed under a pillow or mattress) can help ensure that a person who is deaf or hard of hearing is notified of an emergency, including while sleeping. The U.S. Fire Administration specifically recommends smoke alarms with a strobe light and/or vibrating pad for people who are deaf or hard of hearing, and notes that these can be used alongside standard audible alarms as part of a home fire safety plan.

Technical requirements for visible fire alarm notification appliances (such as strobe light placement, intensity, and synchronization) are addressed in fire and life-safety codes, including the National Fire Alarm and Signaling Code (NFPA 72); the U.S. Access Board's accessibility guidelines also require that fire alarm systems in covered facilities include both audible and visible alarms. This page provides general awareness of these approaches rather than the detailed technical specifications found in those codes; anyone responsible for a building's fire alarm system should consult the applicable code and a qualified fire protection professional rather than relying on this page.

PUBLIC EMERGENCY ALERTS

Beyond household smoke alarms, public emergency alert systems are also evolving to improve accessibility. The FCC has adopted rules intended to make Wireless Emergency Alerts (WEA) more accessible, including a requirement for supporting American Sign Language video content in alerts and a requirement allowing device users to keep receiving a vibration alert even when an alert originator has otherwise suppressed the alert's default audio tone. As of this writing, these requirements have been adopted but are not yet required to be in place — compliance is phased in over time — so this page describes them as an emerging direction for accessible public alerting rather than a feature available on every device today.

Hearing Access in K–12 Education

In K–12 public schools, the Individuals with Disabilities Education Act (IDEA) requires that eligible students with disabilities receive a free appropriate public education (FAPE), typically implemented through an Individualized Education Program (IEP). IDEA regulations specifically direct an IEP team to consider whether a child needs assistive technology devices and services as part of that planning process.

For a student who is deaf or hard of hearing, communication access needs discussed by an IEP team might include remote microphone (FM/DM) systems, assistive listening systems, preferential seating, or real-time transcription support such as CART or similar services, depending on that student's individual needs. The U.S. Department of Education's Office of Special Education Programs has specifically addressed communication access for students who are deaf, hard of hearing, or have speech disabilities, noting these kinds of supports as examples of what an IEP team might consider.

It's important to understand that these are examples of what a team might decide to include, not a list of technologies every student automatically receives. IEP decisions are individualized, made by a team that includes the student's parents or guardians, based on that specific student's documented needs — there is no assistive technology that IDEA requires for every deaf or hard-of-hearing student, and a school is not required to provide every technology a family might request. The IEP process itself is the mechanism for working through what a particular student needs.

Postsecondary Education

The legal framework changes when a student moves from K–12 into college or another postsecondary program. According to the U.S. Department of Education, "the IDEA and its individualized education program (IEP) provisions do not apply to postsecondary schools." Instead, Section 504 of the Rehabilitation Act and Title II or Title III of the Americans with Disabilities Act (ADA) are the relevant frameworks, and a postsecondary school's obligation is different from the K–12 obligation to provide FAPE: rather than developing an IEP, a postsecondary school is required to provide appropriate academic adjustments so that it does not discriminate on the basis of disability.

In practice, this often means that a college student who is deaf or hard of hearing works with the school's disability services office to arrange accommodations such as captioning, assistive listening equipment, note-taking support, or interpreting services for a particular course or program, rather than continuing an IEP created in high school.

Employment and Workplace Access

Under the ADA, employers generally have an obligation to provide reasonable accommodations to qualified employees with disabilities, including employees who are deaf or hard of hearing, through an interactive process between the employee and employer. The U.S. Equal Employment Opportunity Commission (EEOC) has issued guidance describing examples of accommodations that may be appropriate in different work situations, which can include things like captioned or accessible telephones, video relay or video remote interpreting services, assistive listening devices for meetings, visual alert systems in place of or alongside audible alarms, and real-time captioning (CART) for meetings or training sessions.

The Job Accommodation Network (JAN), a Department of Labor-funded resource, provides practical, situation-specific guidance on accommodating employees who are deaf or hard of hearing across a range of job functions and can be a useful starting point for employers and employees working through the interactive process together.

Because reasonable accommodation is determined case by case based on the specific job, workplace, and individual, this page does not suggest that a particular accommodation is automatically required or guaranteed for any employee.

Public Spaces and Assistive Listening Access

Many public venues — theaters, meeting rooms, courtrooms, and other assembly spaces — are subject to ADA accessibility requirements around assistive listening. Under the 2010 ADA Standards for Accessible Design, most assembly areas — theaters, meeting rooms, classrooms, and similar spaces where hearing what's said is central to using the space — must have an assistive listening system. The one narrow exception: a space that has no sound amplification system installed at all doesn't need one, since there's no amplified audio to make accessible in the first place. Courtrooms are the exception to that exception — they must have an assistive listening system no matter what, even if the courtroom has no amplification system. Where a system is required, the ADA Standards also set out a minimum number of receivers based on the size of the space, with a portion of those receivers required to be hearing-aid compatible (able to interface with a telecoil through a neckloop).

It's worth understanding that assistive listening is only one of several kinds of "auxiliary aids and services" that the ADA discusses as tools for ensuring effective communication with people who have hearing or speech disabilities — others include sign language interpreters, video remote interpreting, real-time captioning, and written materials, among others. A venue's overall communication accessibility typically involves more than assistive listening equipment alone.

BLUETOOTH AND WIRELESS CONNECTIVITY CONCEPTS

Many modern hearing devices and assistive listening products can connect wirelessly to smartphones, televisions, and other audio sources using Bluetooth or similar wireless technology, allowing audio to stream directly to the listener rather than through open-air speakers.

ENVIRONMENTAL CONSIDERATIONS

Background noise, room acoustics, distance from the sound source, and lighting for visual communication such as speechreading or sign language can all affect how well a person can access spoken communication in a given environment.

FEATURE MATCHING

Selecting hearing access technology generally involves matching a person's specific hearing access needs, listening environments, and communication preferences to the features of available devices and systems. This page does not make individualized hearing aid recommendations; an audiologist or hearing health professional can help determine appropriate options for an individual.

RELATED RESOURCES

For more information on mobile accessibility features related to hearing, see Mobile Device Accessibility. For information on augmentative and alternative communication, see Communication & AAC. For individualized evaluation of hearing access and other assistive technology needs, see AssistiveTechnologyEvaluations.org. For ongoing coverage of developments in hearing access technology, see AssistiveTechnologyNews.org, an information resource maintained by Accessibility Clinic Inc.