WELLbuilt on Acoustics

Why acoustics matter and what the science tells us. How sound can influence stress levels, sleep quality, concentration and more.

Transcript

WELLbuilt Element 3: Acoustics — The Invisible Stressor in Our Homes

When we talk about designing better homes, most people immediately think about what they can see

Amazing Kitchens, Pretty Lighting.

Luxury Finishes, optimized Layouts, etc

But one of the most powerful forces shaping how a home actually feels is something we almost never design intentionally.

Sound.

 intro music (donated by Hill Makes Music)

Welcome back to the Renovation Secrets podcast, where we talk about some of the uncomfortable truths in the residential design, build, and renovation industry. And why I created the WELLbuilt system to help designers, builders, AND homeowners maximize the HOW of making our homes support our health and well-being.

For those of you who are new here WELCOME. My name is Natalia Pierce, and with over 20 years in the renovation industry, as a Certified Master K&B designer and WELL AP-certified, I have seen firsthand how our homes are failing the families who live in them. Today’s episode is on Acoustics and how sounds can be more disruptive than we think.

The reality is—most homes today are not acoustically healthy environments.

They may be beautiful, efficient, and even high-performance by energy standards.

But acoustically? Many of them are quietly working against us every single day.

Today I want to talk about why acoustics matter, what the science tells us, and how sound influences our stress levels, sleep quality, concentration, and long-term health in ways most people never realize.

The Brain Never Stops Listening

Here’s something fascinating.

Even when you’re asleep, your brain is still listening.

Your auditory system never fully shuts off. It continues scanning the environment for signals that could represent risk or change.

From a survival perspective, that makes perfect sense.

But in a modern home filled with mechanical systems, traffic noise, appliances, open-concept layouts, and reflective surfaces—it means the nervous system is constantly processing background stimulation.

Not consciously.

But biologically.

The World Health Organization Environmental Noise Guidelines for Europe make something very clear:

Environmental noise is linked to measurable increases in cardiovascular disease risk, sleep disturbance, cognitive impairment in children, and chronic stress responses.

And importantly—

These effects happen below the level where people report being bothered by noise

In other words, your body reacts even when you think you’re used to it

Silence Is Not Empty — It’s Biological Recovery

One of the most overlooked wellness tools in a home is access to quiet.

Not just “less noise.”

Actual acoustic calm.

Research in neuroscience has shown that periods of silence support:

• memory consolidation

• nervous system regulation

• reduced cortisol levels

• improved cognitive performance

Consider this example: Have you ever noticed that when you need to concentrate on following directions while driving to someplace new, you turn the radio down? This is how your brain prioritizes concentration, it’s like have too many tabs open on your computer. Once you shut most of them down your system functions a little faster.

Silence allows the brain to shift out of alert mode.

It creates space for concentration AND restoration.

Most homes today are designed with hard flooring, open layouts, tall stairwells, and minimal acoustic separation between spaces.

So instead of recovery, we get continuous stimulation.

Think about the last time you sat in a truly quiet room.

No HVAC noise.

No refrigerator hum.

No traffic outside.

No voices from another floor.

It’s rare.

And when it happens, people immediately notice how different they feel.

That’s not psychological.

That’s neurological.

The Problem with Modern Open-Concept Homes

Open-concept living changed the way homes look.

But it also changed the way sound behaves.

Sound travels vertically through staircases. Horizontally through open kitchens. Across hard floors.

Bounces off large windows, and runs through mechanical systems.

Without intentional acoustic planning, these homes become echo chambers.

The result?

Speech intelligibility drops.

Background noise increases.

Privacy disappears.

Stress rises.

And families often don’t realize why the space feels uncomfortable—they just know something feels “busy” all the time and there is no volume button to turn down like we can in the car

Mechanical Noise Is the Hidden Culprit

One of the biggest acoustic stressors in homes isn’t people.

It’s equipment.

Range hoods.

Ventilation systems.

Furnaces.

Bathroom fans.

Dishwashers.

If range hoods are too loud, people stop using them, Which becomes an indoor air quality problem.

This is where acoustics and IAQ intersect directly

ASHRAE guidance consistently emphasizes that ventilation systems must be quiet enough to support continuous operation.

Because if they aren’t used, they don’t work.

And in kitchens especially, this matters more than most people realize.

A quiet range hood isn’t a luxury upgrade.

It’s a health strategy.

Sound and Sleep: The Most Critical Connection

If there’s one place acoustics matter most, it’s the bedroom.

The World Health Organization recommends nighttime environmental noise exposure remain below 40 decibels to protect sleep quality.

For context

A typical suburban bedroom near a roadway often exceeds that level.

Even small noise interruptions—like HVAC cycling or a distant truck—can shift sleep stages without waking someone fully.

And those disruptions accumulate over time.

Poor sleep isn’t just about feeling tired.

It affects:

• immune function

• metabolic health

• memory

• mood regulation

• cardiovascular risk

Designing for quiet sleeping environments may be one of the most powerful wellness interventions available in residential construction.

Why Builders Rarely Talk About Acoustics

Acoustics are rarely part of the residential conversation because building code doesn’t demand much of them

Code protects life safety.

It doesn’t optimize human performance.

So unless someone intentionally brings acoustics into the design process, they’re usually ignored.

Yet organizations like ASHRAE are increasingly recognizing the importance of indoor environmental quality—including sound—as part of healthy buildings

Commercial spaces have been addressing this for years.

Residential design is just starting to catch up.

Where Homes Commonly Fail Acoustically

There are predictable problem zones in almost every house

Two-storey entryways that act like sound funnels

Open staircases connecting living spaces.

Hard surface flooring across entire main levels.

Laundry rooms beside bedrooms

Mechanical rooms under sleeping areas.

And kitchens placed at the center of everything—which means the noisiest room in the home becomes the acoustic hub

These aren’t design mistakes. They’re simply decisions made without acoustic awareness.

The Goal Isn’t Silence Everywhere

Healthy homes aren’t silent. They’re balanced.

We want:

·         quiet where restoration happens

·         clarity where conversation happens

·         control where activity happen

Acoustic comfort means shaping how sound moves—not eliminating it

Soft finishes in key locations.

Door placement that limits transmission.

Mechanical selections with low sound ratings.

Strategic separation between active and quiet zones.

These are small decisions that create enormous improvements in daily experience.

Acoustics need to be considered as a Wellness Strategy

When people hear the word acoustics, they often think of music studios or theaters.

But in reality, acoustics are part of how the nervous system interprets safety inside a space.

A calm environment supports regulation.

A noisy one maintains alertness

And over time, that difference shapes how we think, sleep, and function.

That’s why acoustics are one of the five core elements in the WELLbuilt framework.

Because designing healthier homes isn’t just about what we can see.

It’s about what our bodies are constantly responding to—even when we don’t notice it.

A Simple Question to End With

If lighting affects how we see…

and air quality affects how we breathe…

then acoustics affect how we recover.

So the next time you walk into a home, ask yourself:

Does this space allow the brain to rest?

Or does it keep listening all day long?

That answer changes everything about how a home truly performs.

And it’s exactly why acoustics deserve a place in every conversation about better residential design.

If you want more information on the WELLbuilt system head to our website at detail-by-design DOT ca – forward slash WELLbuilt. As a professional you can sign up for the program on our website – detailbydesign.ca – forward slash wellbuilt. 

We also offer a WELLbuilt Home analysis for the concerned homeowner.

Until next time find time for silence and thanks for listening. Credits to Hill Makes Music for our intro music

Have a great day.