Why does my house make noises?
Houses click, whoosh and hum because machines turn on and off and things warm up and cool down. Most sounds are everyday sounds. A new or loud sound is a reason to tell a grown-up.
Your house is full of machines: the AC and heater, the fridge, fans and more. Each one makes its own sound. When you learn the everyday sounds, you become a great listener, and you will notice when something new happens.
Everyday sounds
These are the sounds you will probably hear most days.
Click
A small click near the thermostat, or from the closet where the AC lives, is often the system getting the signal to start or stop. It is like a light switch inside the machine.
Whoosh
A soft whoosh from the vents means air is moving through the ducts and into your room. It starts a few seconds after the click.
Hum
The fridge hums when it is cooling. A low hum through the wall can be the outside AC unit working. Big machines with motors hum.
Drip outside
Drip-drip from the gutters or the roof edge after it rains is water finding its way down. Rain outside is an everyday drip.
Tick or ping
Metal ducts get a little bigger when they warm up and a little smaller when they cool down. That can make a soft tick or ping, mostly when the system starts or stops.
Creak at night
Wood in the walls and floors shrinks a tiny bit as the house cools at night. That can make a creak or a pop.
Clunk from the freezer
If your fridge has an ice maker, it drops new ice cubes into the bin with a clunk.
Whir in the bathroom
The bathroom fan whirs while it pulls steamy air out of the room.
Tell-a-grown-up sounds
These sounds are not everyday sounds. You do not need to know what is wrong. Just tell a grown-up, and for a drip inside, an alarm or a strange smell, tell them right away.
| You hear | It might sound like |
|---|---|
| 🔨 Banging or clanking | Something hitting metal |
| 📢 Screeching or squealing | A loud, high squeak that keeps going |
| ⚙️ Grinding | Rough scraping, like gravel in a blender |
| ⚡ Buzzing that will not stop | A loud, angry bee sound from a machine or the wall |
| 🐍 Hissing | Air or water escaping, near the AC closet or pipes |
| 🥁 New rattling | Something loose shaking, that you never heard before |
| 💧 Dripping inside | Drips from a ceiling, a vent or the AC closet |
| 🔔 Any alarm beeping | A loud beep that keeps going |
| 👃 Any sound plus a smell | Any sound with a strange smell or smoke |
Be a sound detective
- Sit very still in one room for one minute. Close your eyes if you like.
- Count the sounds you hear. Which ones come from machines?
- Wait for the AC or heat to start. Can you hear the click, then the whoosh?
- Move to a different room and listen again. Which room is quietest?
My Listening Log
Print this page and fill in the log on paper over a few days.
| Day | What I heard | Where | Everyday or new? |
|---|---|---|---|
| 1 | Everyday New | ||
| 2 | Everyday New | ||
| 3 | Everyday New | ||
| 4 | Everyday New | ||
| 5 | Everyday New |
Ticked “New”? Tell a grown-up about it.
Why are houses quieter on some days?
On a mild spring or fall day, the AC and heat may hardly run at all. On a hot summer afternoon or a cold winter morning, they run a lot more, so you hear the click and whoosh more often.
Why can I hear the outside unit from inside?
The outside unit has a big fan and a part called the compressor that pumps the cooling fluid around. Sound travels through walls and windows, so you can hear a low hum even from inside.
Why does the house sound different at night?
At night there are fewer cars, voices and TVs, so small sounds like a creak or the fridge hum seem louder. They were there in the daytime too. You just could not hear them.
