HillPoint Insight

Acoustic Insights

Practical notes on the acoustic problems that show up in offices, meeting rooms, classrooms, and commercial interiors.

Infographic showing three fire rating tiers for acoustic panels with Class A mineral fibre, Class B PET, and Class C untreated wood, with flame spread indices and application zones

Standards

Fire-Rated Acoustic Panels: What Class A, B, and C Mean for Your Project

Class A, B, and C fire ratings determine where acoustic panels can go in your building. Here is what each class means under NBC 2016 and ASTM E84.

Read article

Cross-section infographic of a server room acoustic wall assembly showing MetPan perforated panels, mineral wool infill, mass barrier, and acoustic door with dB readings on both sides

Soundproofing

Server Room Soundproofing: How to Block 85 dB Without Blocking Airflow

Server rooms run at 85 dB. The office next door needs 45 dB. Here is how acoustic wall assemblies, louvres, and doors deliver that 40 dB gap without blocking airflow.

Read article

Top-down plan view infographic of a recording studio control room showing first reflection paths from speakers to listener, treatment zones, and the mirror trick diagram

Acoustic Design

Recording Studio Acoustic Treatment: First Reflections, the Mirror Trick, and Where to Place Panels

First reflection points colour your monitor sound. The mirror trick finds them. Here is where to place absorption and diffusion in a control room.

Read article

Top-down infographic of a call centre floor plan showing three acoustic zones with distraction distance circles shrinking after ceiling baffle treatment

Office Acoustics

Call Centre Acoustics: How to Control Noise When 200 People Talk at Once

Call centres hit 70-75 dB ambient noise. Distraction distance reaches 8-10 metres. Ceiling baffles and acoustic zoning cut it in half. Here is the approach.

Read article

Infographic comparing acoustic treatment and soundproofing side by side, showing absorption inside a room versus blocking between rooms

Acoustic Basics

Acoustic Treatment vs Soundproofing: Two Different Problems, Two Different Solutions

Acoustic treatment absorbs echo inside a room. Soundproofing blocks sound between rooms. Different problems, different products. Here is how to tell which you need.

Read article

Top-down infographic of a co-working floor plan showing sound flanking over phone booth and meeting room partitions through the shared ceiling plenum

Office Acoustics

Co-Working Space Acoustics: Why Privacy Fails and What Actually Fixes It

Phone booths and glass meeting rooms look private. Sound flanks over their walls through the ceiling plenum. Here is what actually delivers acoustic privacy.

Read article

Auditoriums

Cinema Acoustics: What Makes a Cinema Sound Like a Cinema

Cinema acoustic design targets RT60 of 0.6 to 0.7 seconds and NC-25 to NC-30 background noise. Here is how treatment and isolation work together.

Read article

Three-column comparison infographic showing cross-sections of PET, mineral fibre, and wood acoustic panels with NRC ratings and comparison table

Acoustic Design

PET vs Mineral Fibre vs Wood Acoustic Panels: Which Material Fits Your Project

PET, mineral fibre, and wood panels can all reach similar NRC values. Sustainability, moisture resistance, fire rating, and aesthetics determine which fits your project.

Read article

Three-panel infographic showing the same room untreated with chaotic reflections, over-absorbed and dead, and balanced with absorption and diffusion

Acoustic Basics

Absorption vs Diffusion in Acoustics: What Each Does and When to Use Them

Absorption removes sound energy. Diffusion scatters it. Too much of either creates a problem. Here is how to balance both for rooms that sound natural.

Read article

Before and after infographic of a banquet hall showing chaotic sound reflections with RT60 3.5s on the untreated side and controlled acoustics with RT60 1.2s on the treated side

Hospitality Acoustics

Banquet Hall Acoustics: Why Nobody Heard the Speeches at Your Last Event

Banquet halls with 6m ceilings and hard surfaces push RT60 past 3.5 seconds. Speeches blur after three rows. Here is what treatment fixes.

Read article

Before and after infographic of an ICU showing noise sources with dB levels on the untreated side and acoustic treatment with reduced levels on the treated side

Healthcare Acoustics

Hospital Acoustics: What Quiet Zone Standards Require and Why Most Hospitals Miss Them

WHO recommends 35 dB overnight in hospitals. Most ICUs average 52 to 59 dB. Here is where the noise comes from and what acoustic treatment actually changes.

Read article

Isometric infographic of a gym interior showing three colour-coded acoustic zones: red impact noise area, amber music bleed zone, and green ambient noise area with treatment solutions

Fitness Acoustics

Gym Acoustics: Three Noise Problems That Need Three Different Fixes

Gyms face three noise problems: impact from weights, music bleed from studios, and reverberation from hard surfaces. Here is how to treat each zone.

Read article

Cross-section infographic showing HVAC noise path from air handling unit through ductwork to office ceiling diffuser, with NC curve chart showing target zones

Office Acoustics

HVAC Noise in Offices: What NC Curves Mean and Why Your Office Probably Exceeds Them

HVAC systems are the biggest source of background noise in offices. NC curves define acceptable levels. Here is what the ratings mean and how to hit them.

Read article

Classroom infographic showing speech intelligibility gradient from green (STI 0.75) at the front to red (STI below 0.45) at the back, with STI scale and treatment solutions

Education Acoustics

Classroom Acoustics: Why Students in the Back Row Miss What the Teacher Says

Students in the back row can lose 40 percent of speech clarity in untreated classrooms. STI and RT60 explain why. Here is what treatment fixes.

Read article

Infographic showing restaurant noise levels rising from 55 dB at 6 PM to 78 dB at 8 PM due to the Lombard Effect, with expanding noise bubbles around tables

Hospitality Acoustics

Restaurant Acoustics: Why Restaurants Get Louder Every 15 Minutes

Restaurant noise levels can climb from 55 dB to 78 dB in two hours. The Lombard Effect creates a feedback loop that acoustic treatment breaks. Here is what works.

Read article

Cross-section infographic of two adjacent hotel rooms showing sound leakage paths through party wall, door undercut, bathroom duct riser, and electrical outlets

Hospitality Acoustics

Hotel Soundproofing: Why Guests Hear Everything Despite STC 50 Walls

STC 50 walls don't help if sound flanks through door gaps, ducts, and back-to-back outlets. Here are the noise paths in hotel rooms and how to treat each one.

Read article

Three side-by-side cross-section diagrams comparing vertical acoustic baffles, horizontal ceiling clouds, and lay-in ceiling tiles with absorption paths shown

Ceiling Acoustics

Acoustic Baffles vs Clouds vs Ceiling Tiles: Three Ceiling Treatments for Three Different Jobs

Baffles, clouds, and ceiling tiles all absorb sound. They solve different problems. Here is when to spec each one and what happens when you pick wrong.

Read article

Cross-section diagram of two adjacent rooms showing sound flanking over a partition wall through the plenum, under through the floor, and around through duct penetrations

Soundproofing

Sound Flanking Paths: Why Walls Alone Don't Stop Sound

Partition walls rated STC 50 often deliver STC 25 to 30 in practice because sound flanks over, under, and around them. Here are the paths and fixes.

Read article

Cross-section diagram showing the same acoustic panel mounted three ways with different NRC absorption curves: flush mount, 25mm air gap, and 50mm air gap

Acoustic Basics

Acoustic Panel Air Gap: Why 50mm of Empty Space Outperforms a Thicker Panel

A 50mm air gap behind an acoustic panel can improve low-frequency absorption as much as doubling the panel thickness. Here is how mounting method changes NRC.

Read article

Isometric 3D cutaway of a mosque prayer hall showing sound reflections from domed ceiling and marble floors with red arrows, and treated zones with green absorption indicators

Worship Acoustics

Mosque Acoustics: Designing Prayer Halls for Speech Clarity

Domed ceilings and marble floors push mosque RT60 past 4 seconds. Here is how acoustic treatment restores speech clarity while preserving architectural identity.

Read article

Infographic showing recycled plastic bottles being collected, shredded, spun into fibers, and pressed into SOF PET acoustic panels with sustainability and NRC performance figures

Sustainability

Recycled PET acoustic panels: from plastic bottles to sound panels

SOF PET panels turn recycled bottles into high-NRC acoustic treatment with lower water use, lower energy use, zero VOC emissions, and a practical end-of-life recycling path.

Read article

Infographic explaining the WELL v2 Sound concept with background noise control, reverberation time, and sound barrier requirements for healthy buildings

Standards

WELL building standard acoustics: what architects need to know

WELL v2 treats sound as a core building-health requirement, which means acoustic planning has to start early enough to shape partitions, doors, ceilings, and HVAC noise targets.

Read article

Infographic showing speech privacy zones in an open office, including full distraction, partial distraction, and background noise zones with absorb, block, and mask strategies

Office Acoustics

Distraction distance: the metric that defines open office acoustics

Distraction distance explains why some open offices leak conversations across the floor and why absorption, barriers, and controlled background sound have to work together.

Read article

Infographic comparing acoustic panel coverage needs for hard-surface rooms, mixed-surface rooms, and already dampened rooms with first reflection point guidance

Acoustic Basics

How much acoustic panel coverage does your room actually need?

Panel coverage is not a fixed percentage. Room volume, existing finishes, target RT60, and first reflection points decide how much treatment a space actually needs.

Read article

Infographic explaining 38 to 50 dB STC acoustic doors, room types that depend on privacy, and the components that improve door sound isolation

Soundproofing

STC ratings explained: what your acoustic door actually blocks

STC ratings turn door privacy into a measurable specification, but the rating only matters when the core, seals, frame, and installation all work together.

Read article

Infographic explaining what 0.95 NRC acoustic ceiling panels do in classrooms, offices, meeting rooms, and training spaces

Acoustic Basics

What 0.95 NRC ceiling panels actually do for your room

High-NRC ceiling panels change a room at the surface that matters most, lowering reverberation, improving speech clarity, and reducing the need for excessive wall treatment.

Read article

Acoustic Design

The three axes of acoustic design: absorb, block, isolate

Acoustic treatment, sound blocking, and vibration isolation solve different problems. Strong acoustic design only works when all three axes are considered together.

Read article

Infographic comparing an untreated auditorium echo chamber with an acoustically tuned auditorium where every seat has clearer speech and balanced reverberation

Auditoriums

Auditorium acoustics: from echo chamber to every seat crystal clear

Auditorium acoustics are judged from the back row: speech must stay clear, reverberation must stay controlled, and the room still needs enough life for events.

Read article

Infographic showing how ceiling reflections spread sound across an entire office floor compared to contained wall reflections, with ceiling treatment options including baffles, clouds, and performance tiles

Office Acoustics

Why ceiling acoustic treatment matters more than wall panels

In most offices, the ceiling spreads speech and background noise farther than the walls, which is why ceiling treatment often delivers the biggest acoustic improvement.

Read article

Infographic explaining NRC ratings, showing frequency range limitations, panel thickness impact on absorption, flush mount vs air gap mounting comparison, and material NRC comparison chart from marble to acoustic panels

Acoustic Basics

NRC ratings: what the number actually means (and what it hides)

NRC is a useful shorthand for acoustic absorption, but it leaves out the frequency range, panel thickness, and mounting details that decide how a product performs in a real room.

Read article

Infographic comparing treated vs untreated conference rooms for video calls, showing RT60 values, Speech Transmission Index scale, microphone reflection diagram, and recommended treatment placement

Meeting Rooms

Why your video calls sound terrible (it's not your platform, it's your room)

Most bad video-call audio is not the platform or the microphone. It is the conference room sending reflections into the mic.

Read article

Infographic showing sound reflection patterns in glass conference rooms, NRC comparison of glass, concrete, drywall and acoustic panels, and balanced design approach with ceiling absorption

Office Acoustics

The glass wall trap: beautiful design, terrible acoustics

Glass makes offices look open and modern, but it reflects almost all sound and can turn meeting rooms into loudspeakers for the whole floor.

Read article

Infographic showing focused brain vs distracted brain in open offices, conversation bandwidth of 1.6, decibel scale from 40 dB to 70 dB, and acoustic treatment strategies for the 3-6 foot speech zone

Office Acoustics

Open office acoustics: why one conversation costs you 66% of your focus

Open office speech is uniquely distracting because the brain is wired to process language, even when employees are trying not to listen.

Read article

Infographic showing RT60 targets for different room types from meeting rooms at 0.4 seconds to concert halls at 2.2 seconds, with Sabine formula, WELL and ANSI standards marked, and speech vs music reverb comparison

Acoustic Basics

Reverberation time (RT60): the number that defines how your room sounds

RT60 measures how long sound lingers in a room, and it explains why a boardroom, classroom, office, and concert hall need very different acoustic targets.

Read article