What should a venue specify and ask for when it buys an assistive listening system?

Why it matters

A purchasing brief has to describe how people will hear and use the system in the venue. ISCVE's industry guide asks buyers to define users, coverage, audio sources, privacy and responsibility for operating the equipment. The nonprofit Center for Hearing Access (CHA) asks loop purchasers to compare bids on price, terms and standards, and to obtain warranties, maintenance agreements and staff training. These are recommendations and contract provisions, with no comparative purchasing-outcome data in the cited documents^1,2,3.

What the evidence shows

• Define the service before choosing equipment. ISCVE asks which areas need coverage, whether neighbouring rooms will operate simultaneously, whether sound must remain private, what building constraints apply, and who will distribute, clean and maintain receivers. Its guide recognises the convenience of direct telecoil access through loops, while allowing that an indirect system can offer benefits that outweigh that convenience in some settings. It asks that all room audio sources reach the listening system and that its feed be protected from inadvertent changes to the main sound-system output¹.

• Name the performance standard and edition. IEC 60118-4:2014, with its 2017 amendment, addresses installed loop field strength, frequency response and measurement methods. IEC TR 63079:2017 is guidance on loop design, installation, testing, operation and maintenance; its public abstract does not supply detailed acceptance limits. These have different roles. HLAA's nonprofit installation checklist asks for a loop meeting IEC 60118-4 and written evidence of that performance. The detailed verification question is covered in How should a hearing loop be verified?^4,5,6.

• Ask for a site survey and relevant experience. HLAA recommends references, experience in similar buildings and on-site measurements before estimating loop installation cost. CHA recommends at least two bids. Both warn against installing a loop from a computer simulation alone; HLAA specifically says a simulation cannot determine whether magnetic background noise is present^6,2.

• Put acceptance tests and their records in the brief. The industry code distributed by ISCVE recommends subjective and objective tests appropriate to the technology, followed by a report to venue management. It accounts for normal receiver positions and the effects of occupancy. Some simple one-to-one systems may need only listening tests, with measurements if performance is uncertain. Its handover guidance applies to any system and includes coverage maps, commissioning reports and equipment settings. The installer Assist2Hear's manufacturer-derived 2024 template adds a test method statement and notice so the client can witness tests; its technical references need checking because it still specifies the 2006 loop standard^7,8,4.

• Calculate receivers and specify how they connect to listeners. For US assembly areas covered by the 2010 ADA design standards, sections 219 and 706 govern receiver numbers and technical provision. Table 219.3 uses seating capacity, with fractions rounded upward: a 100-seat room needs four receivers, including two hearing-aid-compatible receivers, before exceptions. Section 706.3 specifies telecoil coupling through neckloops for that compatible share; section 706.2 requires a 1/8-inch mono jack. A loop serving every seat removes the required compatible share, not the total receiver requirement. Receiver numbers may be calculated from the combined seating of assembly areas in the same building under one management, provided every receiver works with every system. These are US design provisions, whose construction and alteration scope must be checked for the project⁹.

• Demonstrate the actual reception paths. ISCVE asks whether a system works with a range of typical smartphones and receivers, and explains that some neckloops are designed for particular receivers. For Wi-Fi streaming, it recommends testing network performance and delay under normal traffic before installation. The Bluetooth SIG's version 3 transmitter guide requires Standard Quality audio for public Auracast broadcasts because High Quality support is optional for receivers; it also recommends walking the intended coverage area with a receiver and repeating checks when the room is occupied. The guide ties these mandatory audio settings to the SIG's Auracast trademark requirements^1,10.

• Keep hearing-device procurement separate from venue procurement. EFHOH's April 2026 motion asks public health purchasers to require both telecoil and Auracast functions in hearing aids and cochlear implants. This nonprofit advocacy position supports continued access to existing and newer venue systems, and identifies the added complexity of using an assistant device to choose a broadcast. It is not a venue tender specification or evidence of what venue buyers prefer¹¹.

• Require a usable handover. ISCVE's code asks for as-fitted drawings, equipment handbooks, operating instructions, coverage maps, commissioning reports and commissioned control settings. Venue staff should hear a demonstration; at least one representative should receive the training and equipment needed for routine tests. Customer-facing staff need training and refreshers on helping users, and a documented process for resolving complaints. Its routine checks use the normal audio source, are logged, and occur at least monthly, weekly for regular use, before events and regularly during events⁷.

• State warranty and support separately. CHA asks for warranties and maintenance agreements without setting a universal term. One public purchasing example, Joburg City Theatres' tender closing in September 2025, requires at least 12 months of warranty on equipment and installation workmanship, plus drawings, test results and staff training; a post-installation support proposal is optional. This shows what one buyer specified, with no evidence here of the completed installation. The broader cost evidence is in What does each system cost to install and to run over its life?^2,3.

Where sources disagree

The sources agree on defining the intended service and checking the installed result, but their technical detail and authority differ. Assist2Hear's template is labelled 2024 yet repeatedly cites IEC 60118-4:2006, which the 2014 edition replaced. Joburg's tender includes an item suggesting neckloop use with hearing aids without telecoils; ISCVE explains that the neckloop path requires a telecoil. Neither document should be copied into a new brief without checking those particulars^8,4,3,1.

HLAA and CHA describe a final check by a hearing aid user familiar with loops as a standard requirement, but that assertion has not been verified here against the paywalled clauses. ISCVE recommends listener involvement and technology-specific tests, and permits subjective assessment alone for some simple systems. Its code does not require a separate external assessor for every installation. The SIG's Auracast guide supplies broadcast settings and a coverage-check method, with no numeric coverage pass/fail threshold^6,2,4,7,10.

What would settle it

Comparable follow-up of purchased systems would show whether these provisions lead to working coverage, successful use of personal and loan devices, sustained staff competence and prompt repairs. Published acceptance reports linked to later user feedback and maintenance records would test the practices recommended by ISCVE, HLAA and CHA; a tender's list of deliverables alone cannot establish those outcomes^7,6,2,3.

Planning while it is open

1. Write a brief covering users, listening areas, simultaneous room use, privacy, audio feeds and who will operate the service. Use it to compare proposals, with on-site loop assessment and relevant installer references^1,6,2.
2. Name the applicable rules, standard and edition, and agree the technology-specific acceptance tests and handover records. Include normal audio sources, receiver positions, coverage and occupancy; have users try the system as part of the assessment^4,9,7.
3. Specify receiver quantities, headphones and neckloops as appropriate to the applicable rules and audience, with charging, cleaning and distribution arrangements. Check the intended personal-device and loan-receiver paths, and require Standard Quality availability for public Auracast audio^9,1,10.
4. Include drawings, settings, test reports, operating instructions, staff training, routine test equipment and a maintenance schedule. Record the warranty terms and ongoing support offered so both can be compared across bids^7,2,3.

Sources

1. A Guide to Assistive Listening Systems. Institute of Sound, Communications and Visual Engineers. Institute of Sound, Communications and Visual Engineers (copy hosted by the Center for Hearing Access), undated (read 13 October 2026). Trade body (ISCVE, a professional audio industry institute; the guide names no funder) ↩︎ https://centerforhearingaccess.org/wp-content/uploads/ISCVE-Guide-Assistive-Listening-Systems.pdf
2. Hearing Loops: Installations. Center for Hearing Access (The John G. Shedd Institute). Center for Hearing Access, undated (read 13 October 2026). Nonprofit advocacy (Center for Hearing Access, a 501(c)(3) advocacy and education initiative of The John G. Shedd Institute for the Arts, founded in 2024, whose website succeeded hearingloop.org; it states that it accepts no donations from hearing-related vendors) ↩︎ https://centerforhearingaccess.org/biz-hearing-loop-installation/
3. Bid 00370/25: Design, Supply & Installation of Audio Frequency Induction Loop Systems (AFILS) for Joburg City Theatres. Joburg City Theatres. Joburg City Theatres (South African government eTender portal), undated (read 13 October 2026). Government (Joburg City Theatres, a municipal entity, specifying work at three theatres) ↩︎ https://www.etenders.gov.za/home/Download?blobName=5a9e1e63-e394-46bb-bd0d-18da175a2d45.pdf&downloadedFileName=BID00370_25+Design%2C+Supply+%26+Installation+of+Audio+Frequency+Induction+Loop+Systems+%28AFILS%29For+Joburg+City+Theatres.pdf
4. IEC 60118-4:2014 Electroacoustics - Hearing aids - Part 4: Induction-loop systems for hearing aid purposes - System performance requirements. IEC TC 29 (Electroacoustics). International Electrotechnical Commission, 11 December 2014. Standards body (International Electrotechnical Commission; the full text is sold, and only the abstract is public) ↩︎ https://webstore.iec.ch/en/publication/798
5. IEC TR 63079:2017 Code of practice for hearing-loop systems (HLS). IEC TC 29 (Electroacoustics). International Electrotechnical Commission, 10 April 2017. Standards body (International Electrotechnical Commission; the full text is sold, and only the abstract and a preview of the opening pages are public) ↩︎ https://webstore.iec.ch/en/publication/32554
6. Best Practices for Hearing Loop Installation. Hearing Loss Association of America (contact: Juliëtte Sterkens, HLAA hearing loop advocate). Hearing Loss Association of America (Get in the Hearing Loop), 28 October 2021. Nonprofit advocacy (Hearing Loss Association of America, a US consumer organisation; guidance from its hearing loop programme) ↩︎ https://www.hearingloss.org/wp-content/uploads/best-practices-for-hearing-loop-installation.pdf
7. Code of Practice for the Design and Operation of Assistive Listening Systems, Issue 1. Audio Industries Committee on Assistive Listening Systems. Audio Industries Committee on Assistive Listening Systems; distributed by the Institute of Sound, Communications and Visual Engineers (UK), December 2023. Trade body (Audio Industries Committee on Assistive Listening Systems, an audio industry committee; distributed by the Institute of Sound, Communications and Visual Engineers; the code names no funder) ↩︎ https://iscve.org.uk/standards/assistive-listening-guide-and-code-of-practice/
8. U.S. Architectural Specifications for Hearing Loop Systems. Assist2Hear, Inc. Assist2Hear, Inc. (copy hosted by the Center for Hearing Access), 2024. Manufacturer (commercial installer Assist2Hear's template credits Ampetronic's Generic Assistive Listening US Specification Hearing Loop Systems UP60007-11 US as its source; no separate funding is stated) ↩︎ https://centerforhearingaccess.org/wp-content/uploads/Assist2Hear_US-General-Architectural-Specifications_2024.pdf
9. 2010 ADA Standards for Accessible Design. US Department of Justice. US Department of Justice (ada.gov), 15 September 2010. Government (US Department of Justice) ↩︎ https://www.ada.gov/law-and-regs/design-standards/2010-stds/
10. Auracast simple transmitter best practices guide, version 3. Bluetooth SIG, 17 October 2025. Standards body (Bluetooth SIG, an industry association funded by its member companies, which owns the Auracast trademark) ↩︎ https://www.bluetooth.com/wp-content/uploads/2022/10/Auracast-Transmitter_Recommendations.pdf
11. Telecoil and Auracast functionalities should be standard requirements for hearing aids and other hearing devices eligible for public health procurement. European Federation of Hard of Hearing People (EFHOH). EFHOH (position adopted by its members at the 2026 Annual General Meeting), 18 April 2026. Nonprofit advocacy (European federation; EFHOH states that its 2024-2026 publications are co-funded by the EU CERV programme) ↩︎ https://efhoh.org/wp-content/uploads/2026/04/EFHOH-Motion-Telecoil-and-Auracast-functionalities.pdf

Change log

• 13 October 2026Published with 11 sources.
• 13 October 2026Audited citations; clarified site-survey attribution, handover scope, receiver pooling and the basis of Auracast settings.

Cite this question

Every finding here cites its source, and who funded each source is labelled. This site does not recommend products. Found an error or a missing study? Suggest a correction, or see how suggestions are handled.