Acoustics Planning in Event Spaces

Clients don't ask about acoustics. Then they complain their space is uncomfortable without knowing why. Sound is half the spatial experience. Bad acoustics make expensive interiors feel cheap. The problems: Hard surfaces everywhere (popular for aesthetics, terrible for sound). Open plans with no baffling. High ceilings with no absorption. Lack of soft materials. Sound bounces, multiplies, creates fatigue. You're not aware it's happening, but by evening you're exhausted. Our acoustic strategy happens in layers: Base layer: Specify soft materials where possible. Upholstered furniture, curtains, rugs. These absorb sound passively. Architectural layer: Acoustic panels integrated as design elements, not afterthoughts. Fabric-wrapped wall sections, slatted wood panels with backing, suspended ceiling elements. Strategic layer: Placement of noisy functions (kitchens, entertainment areas) away from quiet zones. Doors that actually seal. Insulation in partition walls. In one of the experience centres we recently designed, we had to work extra consciously to deliver a grand acoustic experience. Almost all our decisions regarding material were guided by this, and the finished product - exactly what we wanted it to be! Acoustics don't show in photographs. But they determine whether you want to stay in a space or leave it. Design for ears, not just eyes.

𝐖𝐞𝐞𝐤 3 – 𝐀𝐮𝐝𝐢𝐨 𝐃𝐞𝐬𝐢𝐠𝐧 𝐟𝐨𝐫 𝐒𝐞𝐦𝐢𝐧𝐚𝐫 𝐑𝐨𝐨𝐦𝐬 🎓 Seminar rooms must support 𝐩𝐫𝐞𝐬𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧𝐬, 𝐝𝐢𝐬𝐜𝐮𝐬𝐬𝐢𝐨𝐧𝐬, 𝐚𝐧𝐝 𝐚𝐮𝐝𝐢𝐞𝐧𝐜𝐞 𝐢𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐨𝐧. 𝐊𝐞𝐲 𝐝𝐞𝐬𝐢𝐠𝐧 𝐞𝐥𝐞𝐦𝐞𝐧𝐭𝐬 𝐢𝐧𝐜𝐥𝐮𝐝𝐞: • Balanced sound coverage across seating areas • Wireless microphones for presenters and audience questions • Proper loudspeaker placement to avoid feedback • Integration with recording and presentation systems • Acoustic optimisation for better speech clarity 𝐀𝐥𝐬𝐨 𝐫𝐞𝐟𝐞𝐫: 1) 𝐌𝐢𝐜𝐫𝐨𝐩𝐡𝐨𝐧𝐞 𝐬𝐭𝐫𝐚𝐭𝐞𝐠𝐲 (𝐦𝐨𝐬𝐭 𝐜𝐨𝐦𝐦𝐨𝐧 𝐩𝐚𝐢𝐧 𝐩𝐨𝐢𝐧𝐭): + Presenter mic: lavalier or headset (headset = best clarity/least feedback). + Backup/handheld: always have one ready for Q&A or if a lav fails. + Audience Q&A options: Pass-around handheld + Ceiling array mics (clean look, great for hybrid, needs tuning & good acoustics) + Table boundary mics (works for fixed layouts, can pick up paper noise) 2) 𝐋𝐨𝐮𝐝𝐬𝐩𝐞𝐚𝐤𝐞𝐫 𝐚𝐩𝐩𝐫𝐨𝐚𝐜𝐡: + Prefer distributed speakers for even coverage vs one loud source. + Keep speakers in front of microphones where possible. + Aim for high intelligibility over “loudness” (speech first, not music PA). 3) 𝐃𝐒𝐏 + 𝐩𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠 (𝐰𝐡𝐞𝐫𝐞 𝐪𝐮𝐚𝐥𝐢𝐭𝐲 𝐢𝐬 𝐰𝐨𝐧/𝐥𝐨𝐬𝐭): + Automatic mixing (gates unused mics to reduce noise/echo). + AEC (echo cancellation) for video calls (Teams/Zoom) is essential. + EQ and dynamics tuned for speech (avoid boomy low end). + Feedback suppression only as a last layer—not the core solution. 4) 𝐑𝐨𝐨𝐦 𝐚𝐜𝐨𝐮𝐬𝐭𝐢𝐜𝐬 (𝐨𝐟𝐭𝐞𝐧 𝐢𝐠𝐧𝐨𝐫𝐞𝐝): + Watch for reverberation from glass, concrete, high ceilings. + Add acoustic panels / treatment to improve intelligibility. + HVAC noise matters: high background noise forces louder systems and reduces clarity. 5) 𝐇𝐲𝐛𝐫𝐢𝐝 𝐭𝐞𝐚𝐜𝐡𝐢𝐧𝐠 / 𝐫𝐞𝐜𝐨𝐫𝐝𝐢𝐧𝐠 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬: + Decide early: in-room reinforcement only vs reinforcement + capture. + For recording, prioritize direct mic feeds over “room mic” sound. + Consider mix-minus routing so far-end audio doesn’t feed back into itself. 6) 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 & 𝐮𝐬𝐚𝐛𝐢𝐥𝐢𝐭𝐲 (𝐤𝐞𝐞𝐩𝐬 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐮𝐬𝐞𝐝): + Simple preset-based UI: “Lecture / Discussion / Hybrid Call” + Clear mic storage/charging plan (and spares). + “One button to start” workflow for non-technical users. 7) 𝐂𝐨𝐦𝐦𝐢𝐬𝐬𝐢𝐨𝐧𝐢𝐧𝐠 & 𝐯𝐞𝐫𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧 (𝐭𝐡𝐞 𝐩𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭𝐢𝐚𝐭𝐨𝐫): + Measure and document: SPL, STI/ALCons, noise floor. + Do a real walk test with speech, not just pink noise. + Train users + leave quick-start guides. The objective is simple: 𝐞𝐯𝐞𝐫𝐲 𝐩𝐚𝐫𝐭𝐢𝐜𝐢𝐩𝐚𝐧𝐭 𝐬𝐡𝐨𝐮𝐥𝐝 𝐡𝐞𝐚𝐫 𝐭𝐡𝐞 𝐩𝐫𝐞𝐬𝐞𝐧𝐭𝐞𝐫 𝐜𝐥𝐞𝐚𝐫𝐥𝐲 𝐟𝐫𝐨𝐦 𝐚𝐧𝐲 𝐬𝐞𝐚𝐭. "𝑮𝒐𝒐𝒅 𝒂𝒖𝒅𝒊𝒐 𝒅𝒆𝒔𝒊𝒈𝒏 𝒊𝒔 𝒏𝒐𝒕 𝒂𝒃𝒐𝒖𝒕 𝒍𝒐𝒖𝒅 𝒔𝒐𝒖𝒏𝒅 — 𝒊𝒕 𝒊𝒔 𝒂𝒃𝒐𝒖𝒕 𝒄𝒍𝒂𝒓𝒊𝒕𝒚, 𝒄𝒐𝒗𝒆𝒓𝒂𝒈𝒆, 𝒂𝒏𝒅 𝒂𝒖𝒅𝒊𝒆𝒏𝒄𝒆 𝒆𝒙𝒑𝒆𝒓𝒊𝒆𝒏𝒄𝒆."

Even the best microphone array struggles with poor room acoustics. Why does this matter so much? RT60 is the time it takes for sound to decay by 60 decibels in a room. It's the key metric for speech intelligibility in meeting spaces. Conference rooms should have RT60 of 0.4 to 0.6 seconds for optimal speech clarity, according to industry standards including WELL Building Standard and Biamp's acoustic guidelines. When RT60 extends beyond 0.8 seconds, speech intelligibility suffers significantly. Here's what happens: consonants get masked by lingering vowel sounds. Important speech details become unclear. Remote participants struggle to follow conversations. If speech originating in the room is unintelligible to listeners in the same room, no microphone can completely overcome this acoustical handicap. High reverberance can be improved but not corrected with electronics, with DSP. Beamforming microphone arrays are often specified without first measuring the room's basic acoustic performance. Even the most sophisticated audio technology has limitations when room acoustics work against it. Room architecture is the most significant factor affecting speech intelligibility. Yet most meeting room projects skip acoustic measurement entirely. A basic RT60 measurement costs little in time and money. This is the  difference between systematic design and expensive guesswork. (As a first step you can use an iPhone, but use an external microphone.) This is also why Audio sits as a standalone pillar in GJC's EASE methodology. Because microphone specifications lose relevance if the room acoustics are wrong. EASE = Environment, Audio, Screens, Equity. See Comments section below to learn more details. What's your experience? Are you measuring RT60 in your meeting rooms, or just hoping expensive microphones will solve everything?! #microsoftteamsrooms #avtweeps #EASEmethodology #hybridmeetings #avusergroup #ltsmg #schoms  #avixa

𝗖𝗿𝗼𝘀𝘀𝘁𝗮𝗹𝗸 𝗶𝗻 𝗕𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗗𝗲𝘀𝗶𝗴𝗻: 𝗦𝗮𝗳𝗲𝗴𝘂𝗮𝗿𝗱𝗶𝗻𝗴 𝗔𝗰𝗼𝘂𝘀𝘁𝗶𝗰 𝗣𝗿𝗶𝘃𝗮𝗰𝘆 𝘊𝘳𝘰𝘴𝘴𝘵𝘢𝘭𝘬 𝘳𝘦𝘧𝘦𝘳𝘴 𝘵𝘰 𝘵𝘩𝘦 𝘶𝘯𝘸𝘢𝘯𝘵𝘦𝘥 𝘵𝘳𝘢𝘯𝘴𝘮𝘪𝘴𝘴𝘪𝘰𝘯 𝘰𝘧 𝘴𝘰𝘶𝘯𝘥 𝘣𝘦𝘵𝘸𝘦𝘦𝘯 𝘳𝘰𝘰𝘮𝘴 𝘵𝘩𝘳𝘰𝘶𝘨𝘩 𝘪𝘯𝘥𝘪𝘳𝘦𝘤𝘵 𝘱𝘢𝘵𝘩𝘴 such as HVAC ductwork, ceiling or floor cavities, and unsealed partitions. It acts as a “flanking” path that bypasses primary acoustic barriers, leading to noise leakage that can compromise speech privacy and overall comfort. 𝗪𝗵𝘆 𝗜𝘁 𝗠𝗮𝘁𝘁𝗲𝗿𝘀 Rooms like meeting spaces, executive offices, medical consult rooms, and any area designated for private or confidential use are particularly vulnerable. Building codes often require sound insulation and crosstalk control in such spaces. Left unchecked, crosstalk can degrade acoustic performance, violate standards, and negatively affect occupant wellbeing and productivity. 𝗖𝗼𝗺𝗺𝗼𝗻 𝗖𝗿𝗼𝘀𝘀𝘁𝗮𝗹𝗸 𝗣𝗮𝘁𝗵𝘀 • Shared Ductwork & Plenums: Air transfer grilles, continuous duct paths, or uninsulated plenums between rooms. • Partition Gaps: Openings above ceilings or beneath raised floors that allow sound to bypass walls. • Service Penetrations: Unsealed openings for pipes, cables, or conduits. These paths are frequently flagged in architectural guidelines as weak points in acoustic design. 𝗠𝗶𝘁𝗶𝗴𝗮𝘁𝗶𝗼𝗻 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗲𝘀 • To effectively block crosstalk, an integrated approach combining design and acoustic treatment is recommended: • Crosstalk Attenuators/Silencers: These devices are installed within ducts, grilles, or wall cavities to absorb sound without restricting airflow. They are essential in spaces requiring speech privacy. • Acoustic Ducting: Use flexible, internally lined ductwork and duct silencers or bends to reduce noise transmission. • Full-Height, Sealed Partitions: Extend walls from slab to slab, seal all gaps with acoustic caulk, and avoid placing electrical or HVAC outlets back-to-back across partitions. • Plenum Return-Air Solutions: Use canopy units over return grilles to block airborne sound within shared ceiling voids. • Isolated HVAC Zones: Avoid routing the same ducts through multiple sensitive areas; if unavoidable, include attenuation measures as specified by acoustic design guidelines. 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 In one of my previous projects, we implemented these crosstalk attenuation measures in sensitive and quiet areas such as prayer rooms and between male and female washrooms. We also applied crosstalk silencers at fresh air terminals and transfer ducts to control cross-room noise propagation. Is your HVAC design optimised to meet acoustic privacy standards? Let's talk. #SoundPrivacy #HVACDesign #NoiseControl #AcousticEngineering

The zero-cost test that predicts whether acoustic treatment will actually help your space. Architect asked yesterday: "How do I know if this conference room needs treatment?" Handed him the largest pillow from the sofa. "Hold it flat against the wall. Clap once. Now remove the pillow, clap again. What changed?" Massive difference. Echo reduced dramatically. That room is a perfect candidate for fabric panels. Mid-to-high frequency absorption will work brilliantly. Different room last week: barely any change between pillow and no pillow. This room needs different treatment. Problem isn't surface reflection that thin panels address - it's low frequency buildup requiring thick bass traps in corners, or flutter echo requiring diffusion panels. The pillow test shows which frequencies are problematic. Acoustics and Psychoacoustics by Howard & Angus explains how fabric materials absorb 0.50-0.85 across speech frequencies (500Hz-4kHz), but have minimal effect below 200Hz. If pillow makes big difference, standard panels help. If pillow barely changes anything, you need bass-specific solutions or geometric treatment instead. Test before you specify treatment. Takes 30 seconds, costs nothing, prevents recommending wrong approach. More acoustic tips on Threads @kevinmariodsouza. What simple tests do YOU use before specifying treatment? #AcousticDesign #AudioEngineering #StudioAcoustics #KevinMarioDSouza #SoundAndAbout

Designing for Sound: Integrating Acoustic Performance into Architectural Planning Acoustics is a fundamental yet frequently underestimated dimension of architectural design. While visual aesthetics and spatial composition often dominate early planning, the way a space manages sound profoundly affects its functionality, comfort, and psychological impact. Understanding and applying key acoustic parameters — most notably the Noise Reduction Coefficient (NRC)—enables designers to create environments that support clarity, focus, and wellbeing.   Understanding NRC in Design Context The Noise Reduction Coefficient (NRC) quantifies how much sound a surface absorbs. Expressed as a value between 0.00 and 1.00, lower readings (e.g., 0.20) reflect sound, amplifying echoes, while higher readings (e.g., 0.80) absorb sound, reducing reverberation and improving speech intelligibility. Materials such as dense concrete or glass have low NRC values, whereas mineral wool panels, acoustic ceiling tiles, or fabric-covered absorbers offer significantly higher acoustic performance.   Material Selection and Spatial Planning However, achieving optimal sound comfort extends beyond selecting high-NRC materials. The distribution, orientation, and geometry of surfaces strongly influence how sound behaves within a room. Combining absorptive and diffusive materials ensures balanced acoustic conditions — absorbing excessive reflections while maintaining a sense of liveliness. For example, integrating acoustic ceilings over collaborative zones, wall panels near reflective surfaces, and diffusers in performance spaces can collectively create a harmonized sound environment.   Human Comfort and Functionality Acoustic design directly impacts productivity and wellbeing. In offices, controlled reverberation improves speech privacy and concentration. In educational and healthcare settings, reduced background noise enhances comprehension and recovery. Designing for auditory comfort is therefore not a luxury — it is a functional necessity and a criterion for sustainable architecture.   Sound as a Design Layer When treated as a parallel design layer alongside lighting, ventilation, and material composition, acoustics transforms from a corrective measure to a proactive design tool. The result is architecture that sounds as good as it looks—spaces that foster communication, comfort, and clarity through intelligent, performance-driven design. #AcousticDesign #ArchitecturalEngineering #BuildingPerformance #InteriorArchitecture #SustainableDesign #WorkplaceWellbeing #SoundDesign #HumanCenteredDesign

If you are planning to build an auditorium, Here’s how you can maximise its performance and long-term value 👇 We put ourselves in the audience’s seat, and we understand how people perceive, experience, and navigate through the space. That’s what helps us design auditoriums that are not just functional, but immersive. Instead of treating it as a large hall with rows of seating, we design the auditorium as an environment where acoustics, sightlines, lighting, and circulation seamlessly work together. For example, we prioritised clear sightlines from every seat, so people don’t strain their eyes to see the stage. Additionally, we place a strong emphasis on acoustic precision. From diffusers and absorptive panels to material selection and wall geometry, every detail was calibrated to create a crisp, echo-free sound experience. Another major aspect we address is ambience. Thoughtful lighting layers, tactile materials, and warm finishes help create a space that feels warm and inviting. By and large, a well-designed auditorium should inspire the audience, empower the performers, and support event management, all while feeling comfortable, intuitive, and technically sound. If you’re planning to build an auditorium that delivers a truly memorable experience, let’s talk.

Quadratic Residue Diffusers are probably the most popular sound diffusers for concert halls, theatres, studios, rehearsal rooms and other music spaces... In many of these spaces, ‘natural sound diffusion’ from rough surfaces does not always solve sound reverberation issues such as echoes, flutter or uneven sound fields 🎭 QRDs, or Schroeder diffusers, use a sequence of wells with calculated depths to scatter sound energy instead of sending it straight back to a listener or microphone 📐 You work with a mathematical structure rather than a random relief, so you gain predictable acoustic behaviour every time 📊 When sound strikes wells of different depths, parts of the wave travel different distances and return at different times, which shifts their phase 🔄 These controlled phase shifts create constructive and destructive interference that spreads energy radially, turning focused reflections into a more uniform diffuse field 🌈 You keep sound energy in the room, but you distribute it more evenly, which supports clarity, envelopment and speech intelligibility in performance spaces 🎻 The article walks you through: 🎻 how to choose a design frequency 🎻 select a prime number of wells 🎻and use the quadratic residue formula to determine well depths and widths 🧮 You also see how material choice, installation on rear walls, ceilings and sidewalls, and the decision between 1D and 2D diffusers affect performance and spatial impression 🏛️ If you design, specify or tune critical listening spaces, you can use these steps to integrate diffusion into your next project with greater confidence 🛠️ Read the full article: https://lnkd.in/eNfkPHKe