Hearing loss is common and varied
Many visitors have some degree of hearing loss, and the number tends to rise with age. Some wear hearing aids or cochlear implants, some do not, and some find that background noise, rather than quiet speech, is the main problem. A hard of hearing visitor is not the same as a deaf visitor who uses sign language, and the supports differ. This article concentrates on listening support. Visual alternatives, such as signed content and subtitles, are covered separately under captions and sign language.
What a hearing loop does
A hearing loop, also called an induction loop, is a cable laid around a listening area. It carries an audio signal as a magnetic field. Many hearing aids and cochlear implants include a small receiver called a telecoil, and when the user switches to the setting for it, the device picks up the signal directly. The benefit is that the sound arrives without the echoes, distance and room noise that often make speech hard to follow.
A few points are worth knowing:
- The user needs a device with a working telecoil that is switched on. Not every hearing aid has one, and some users have never needed to use the setting, so a short notice explaining how can be useful.
- A loop covers a defined area. Visitors outside it get nothing, so it suits a theater, a desk or a seating area better than a whole open gallery.
- Metal structures, electrical equipment and neighboring loops can interfere, so installation usually calls for a specialist who can measure and adjust the field.
- Loops are standardized, which means that the same system should work with many devices, but results depend on setup and need to be checked.
A recognizable symbol, usually showing an ear with a diagonal line, tells visitors where a loop is available. Putting it on signage, maps and the website helps people plan.
Other assistive listening options
A loop is not the only choice, and sometimes it is not the best.
- Personal receivers. Radio or infrared systems send audio to a small receiver with a headset or a neck loop. These can cover wider areas, and the visitor borrows the device at a desk. They need staff to hand out, clean and charge them.
- Direct audio on a visitor’s own phone. Some venues stream exhibit audio to visitors’ devices. This avoids borrowing equipment but depends on the visitor’s phone, headphones and connection, and not everyone has or wants to use them. The idea is explored further in the note on visitor phones.
- Headphone jacks and handsets. A simple socket or a handset on an audio post lets a visitor control volume and hold the sound close. Some can connect to a visitor’s own neck loop. Hygiene is a practical concern, and the same attention that applies to touch hygiene is useful here.
- Audio guides. A handheld or app-based guide often has adjustable volume and a text alternative. See the discussion of audio guides for how these work in galleries.
Offering more than one option usually serves more people than choosing a single technology.
Make the sound itself clearer
Assistive technology helps, but the quality of the source matters just as much. Speech that is recorded clearly and played back at a sensible volume is easier to follow for everyone.
- Record in a quiet space with a good microphone placed close to the speaker. Avoid background music that competes with speech.
- Keep speech and music balanced. Music, effects and ambience can be mixed lower than the voice.
- Use clear delivery. A moderate pace, ordinary phrasing and clear pronunciation help. Do not over-slow or exaggerate.
- Provide volume control wherever it is practical, and make the controls easy to find and use.
- Aim speakers carefully. Directional speakers, audio domes or sound showers can keep sound within a small zone, which limits spill into the next exhibit.
- Always provide text. Captions and transcripts allow a visitor to confirm what they heard. They are covered in more detail in the guide to exhibit captions.
The room matters
Hard surfaces, large open spaces and several competing sound sources make speech much harder to understand, particularly for those with hearing loss. Acoustic panels, soft furnishings and thoughtful layout can reduce reverberation. If noises from nearby exhibits blend together, the issues described under sound bleed will affect all your audio, not only the assisted channels. Spatial or surround setups, discussed in spatial audio, can be impressive but may also be harder for some listeners to follow, so give them a simpler option.
Staff and information
Even the best equipment is of little use if no one knows it exists. Staff should know where loops are, how to lend receivers, and how to test that they work. A short routine in staff training that includes a regular check, since cables can be disconnected and amplifiers switched off, prevents a feature that looks good in the brochure from failing on the day. Staff should also be ready to communicate clearly with a hard of hearing visitor: face the person, speak at a natural pace, and be willing to write something down.
Test with listeners
Loops and receivers can be measured with instruments, but the best check is a visitor who uses them. Try the setup with a few hard of hearing volunteers, ask what they can and cannot hear, and adjust. Re-test after any change to the room, the equipment or the content, and record the results so the next person who maintains the system knows what was done.