"When sound is the programme, define the 'listening environment' before the equipment specifications"

– Why background noise, routes and reverberation must be planned before ordering equipment

Author: EVENTODIT Editorial Team
Published: 2026.10.09
Updated: 2026-10-25T09:41:28Z
Original URL: https://eventodit.com/en/stories/sound-as-programme.html

Practical summary

Event overview: Seoul Forest night ecology programme · sessions announced for 7 and 14 October 2026 / The Art of Sound · Wapping Hydraulic Power Station, London · 11–15 September 2026

Key decision: Identify the sounds and audience positions first; confirm equipment and group size after checking noise, reflections and playback specifications.

Responsible roles / intended readers: Sound-programme planners, guides, audio leads and production staff

Record / next task: Listening objectives, noise sources, audience positions and routes, group size, sessions and final acceptance conditions for the brief and order

Basis of information: Organiser information, reporting and manufacturer guidance compared

Editorial review: 2026-10-25

From insect calls on outdoor ecology walks to sound art resonating among pipes inside an exhibition space, more programmes place sound itself at the centre of the content. Seoul Forest's night-time insect ecology programme and The Art of Sound at London's Wapping Hydraulic Power Station, part of London Design Festival, are representative examples.

The two events differ in location and format, but present on-site planners with the same fundamental challenge: first define "which sounds the audience must be able to distinguish", then work backwards to plan the space, time of day, group size and audio system around that objective. Once a sound programme starts by fixing an equipment hire list and taking it to the venue, it is headed for failure.

1. Outdoors: separate the 'commentary route' from the 'listening points'

A programme that listens to the natural outdoor environment, as in the Seoul Forest example, takes audiences directly into an ecological habitat. A common operational mistake is interference between commentary on the move and listening to the surroundings.

- Group size and distance limits: measure in advance the width of the moving group and the listening radius that one guide can manage.
- Rehearse separate sections: clearly distinguish and rehearse the 'moving section', where the guide speaks directly or through a wireless system, and the 'stationary listening section', where the audience listens to environmental sounds in silence. Pre-event checks must identify interference in which the guide's microphone level or wireless feedback masks the subtle insect calls the audience is meant to hear.
- Check the external noise timeline: outdoor programmes must check whether their times overlap with nearby stage rehearsals, generator operation or music from food and beverage (F&B) stalls.

2. Indoor playback: compare 'room reverberation' and 'file format' before positioning speakers

An exhibition that brings field recordings collected and edited elsewhere into an indoor space, such as London's former hydraulic power station, needs a different approach. Recordings spanning diverse frequency ranges—including birds' wingbeats, freight trains, friction at bridge joints and waves—must be conveyed without distortion inside the structure.

- Prioritise the space over equipment specifications: hiring and bringing in high-output speakers first can blur the intended audio detail because exposed concrete and steel structures have long reverberation. Review wall reflections, noise spilling in from adjacent areas and audio file formats, including lossless compression, before deciding speaker coverage angles and positions.
- Match audience routes to listening positions: even with free timed reservations, account for changes in sound absorption caused by crowding at particular times and for noise from audience movement.

3. A four-stage workflow for sound programmes

Planners and audio directors must work through the following four stages, from the kick-off meeting to the on-site acceptance test.

| Stage and main task | Detailed tasks |
| --- | --- |
| [Stage 1] Define the Listening Objective | Identify the frequencies and characteristics of the sounds the audience must clearly distinguish · Confirm the appropriate capacity per session and the session timetable |
| [Stage 2] Compare environmental noise and audio specifications | Measure background noise (dB), room reflections and interference from adjacent programmes · Check the original audio file specifications, copyright and playback permissions |
| [Stage 3] Confirm system procurement and the Scope of Work | Confirm schedules and routes for equipment delivery, installation, tuning (EQ and coverage-angle adjustment) and removal · Check power-supply stability and distribution capacity |
| [Stage 4] Conduct Acceptance Testing under event conditions | Test at the same time of day as the event, from actual audience listening positions, including the Sweet Spot and edge seats · Make "whether the intended sounds are clearly audible" the final acceptance criterion, rather than simply "whether sound comes out of the speakers" |

Five items for the acceptance record

| Record | What to enter |
| --- | --- |
| Listening objective | The environmental sound or final-file passage to distinguish, and its priority |
| Expected noise sources | Location, operating time, responsible team and whether the source can be adjusted |
| Listening positions and routes | Entrance, centre and edge check points; movement, waiting areas and access conditions |
| Group size and sessions | Planned attendance, test occupancy and dwell pattern, and session conditions to adjust |
| Final acceptance conditions | Listening results by position, unresolved issues, owner, deadline and retest result |

Planner's note: change the Acceptance Criteria

On-site acceptance of a sound programme does not end when the speakers power up and someone presses play. Unloading and installation are complete only when the intended sounds have been verified as distinguishable from where the audience stands.

Before writing equipment model names into the plan or procurement specification, prepare a checklist stating the 'listening objective, expected noise sources, listening positions along audience routes, capacity and final acceptance conditions'. This is how planners can prevent wasted budgets and disrupted rehearsals.

Application conditions

Separate outdoor commentary and listening, checking noise at the operating time. Indoors, review audience-position reflections and playback specifications separately. Obtain specialist review documents for power and distribution.

Unconfirmed information

Sources cover Seoul Forest booking information, the London programme, reporting and a manufacturer guide. Actual session attendance, listening evaluations, measured noise or reverberation, system layouts, tuning and internal acceptance results were not established. The four-stage method and record fields are editorial proposals for other events, not reconstructions of either event's procedures.

Sources

Seoul Metropolitan Government · Seoul Forest autumn programmes
https://www.seoul.go.kr/news/news_report.do?nttNo=465148&srchCtgry=471

London Design Festival · The Art of Sound
https://londondesignfestival.com/activities/the-art-of-sound-featuring-max-cooper-chris-watson

Seoul public service reservations · Autumn Night, an Orchestra of Insects
https://yeyak.seoul.go.kr/web/reservation/selectReservView.do?rsv_svc_id=S260921163222523672

Wallpaper · Reporting on Chris Watson’s London installation
https://www.wallpaper.com/design-interiors/design-events/chris-watson-wapping-power-station-london-design-festival-2026

Yamaha · Get the Room Right First — Understanding Acoustics · guide for worship spaces
https://www.yamaha.com/US/houseofworship/downloadables/Audio-System-How-to-Guides/Understanding-Room-Acoustics-update.pdf