At full cooking power, 4 sones is the certified rating of the best range hood we could verify, which the Home Ventilating Institute puts level with a television at normal volume. In an open-plan room, that hood runs while a guest talks to you across the counter.
A closed kitchen keeps its machines to the cook. Knock the wall through and they belong to everyone: the fridge hums behind the television, the dishwasher runs a few steps from the dining table, and the hood roars through the conversation it was meant to sit beside.
This page starts from the room. It covers what runs when, which number on the box to read for each machine, what to check for beeps and chimes, and how to read the different units makers use. Head-to-head comparisons, one category at a time, live in our buying guides.
Noise is the only subject here, and every figure comes from a maker or a certification body.
How quiet should an open-plan kitchen be?
There is no official noise figure for a kitchen, a living room or an open-plan room. What exists are reference points for the room as a whole.
| Reference point | Figure | Source |
|---|---|---|
| Whispering | 30 dB | NIDCD |
| A refrigerator humming | 40 dB | NIDCD |
| Normal conversation | 60 to 70 dBA | NIDCD |
| A refrigerator, in sones | 1.0 sone | Home Ventilating Institute |
| Typical office noise | 3.0 sones | Home Ventilating Institute |
| A television at normal volume | 4.0 sones | Home Ventilating Institute |
| A bedroom at night | 30 dB(A) ceiling | WHO community noise guidelines |
The NIDCD is the US institute for hearing. The WHO line only applies if a bedroom opens onto the space.
Loudness does not climb in a straight line with decibels. Each 10 dB step doubles it, according to the National Park Service, so a kitchen at 40 sounds twice as loud as one at 30, not a third louder.
Those reference points describe a whole room. A maker's figure covers one appliance, taken from a distance it almost never discloses. Use the room figures to set a target and the maker figures only to weigh one appliance against another; how quiet is quiet enough gives the same yardsticks for every other room.
Eight machines, eight schedules
An open-plan kitchen usually holds about eight machines that make noise. Each keeps a different timetable and each is rated differently. The table pairs every machine with one example from our guides and the figure worth asking for.
| Machine | When it runs | Figure to look for | Example from our guides |
|---|---|---|---|
| Refrigerator | Day and night | A figure with a state, rarely given | Beko BFFD3624ZSS: 35 dBA, no condition stated |
| Dishwasher | After dinner | The figure for your cycle | Samsung Bespoke DW90F89T0USRAA: 38 dBA |
| Range hood | While you cook | Certified sones at your cooking step | FOTILE Pixie Air UQG3002: 1.2 sones at 240 CFM, 6 at 600 CFM boost |
| Microwave | Bursts | Beeps and door as well as cooking | Breville Combi Wave BMO870: 56.4 dBA cooking, lab test Breville cites |
| Garbage disposal | Seconds | No maker gives a decibel figure | InSinkErator Evolution 1.0 HP: sold on a claim of 80% quieter than the Badger 5 |
| Air fryer | 15 to 30 minutes | A ceiling or a bare claim | Cosori Lite 2.1-Quart Mini: "lower than 48dB" |
| Ice maker | Hours per batch | The figure while making ice | Silonn SLIM01B: under 35 dB making ice |
| Wine fridge | Day and night | The basis of the test | Summit CL244WC2: 32.4 dB, Summit's own test |
No row outranks another. A sone is not a decibel, sound power is not sound pressure, and a bare claim is not a measurement. Read the table as a picture of what each machine's paperwork looks like at its best.
Plan around the second column. At night the fridge and wine fridge set the floor of the room. The hood sets the ceiling while you cook. How much of the evening stays quiet is up to the dishwasher.
When each machine makes noise
The fridge runs all day and all night, the dishwasher after dinner and the hood while you cook. Everything else comes in bursts.
The fridge, all day and all night
Late in the evening, with everything else off, the fridge may be the loudest thing in the room. Being able to silence the ice maker and door alarm is worth as much as a low decibel figure. Our refrigerator guide answers which brands offer quiet fridges for open-plan kitchens.
A French door layout brings ice makers, a dispenser and two doors that can each trip the alarm. Our guide to French door refrigerators with a published figure covers what that adds.
The dishwasher, after dinner
Quiet cycles run longer. A delay start, and an end chime you can turn off, decide how much of the evening the machine takes up. The dishwasher guide covers what makes a dishwasher quiet enough for an open-plan kitchen.
The range hood, while you cook
It runs exactly when people want to talk.
Size the hood by the makers' airflow rules first. Then take the sone rating at the lowest step that reaches that airflow, as the range hood guide does for each pick under which speed matters in an open-plan kitchen. That section also deals with island hoods, remote and inline blowers, automatic modes that raise the speed by themselves, and delayed shutoff. Our main guide to the quietest range hoods ranks on the certified high-speed rating and explains why a box usually shows the slowest speed's figure.
Building the hood into cabinetry? The insert and power pack guide compares certified high-speed ratings within airflow bands and names the duct behind each figure. Over an island cooktop, our guide to island range hoods reads each certified hood at whatever speed step a 36-inch island calls for.
Two more guides cover hoods by mounting. The one on under-cabinet range hoods takes the certified sones at the speed step needed over a 30 or 36-inch cooktop, for a hood hanging at face height below the wall cabinets, and the one on wall-mount chimney hoods does the same for a hood with only a wall behind it.
The garbage disposal, for seconds at a time
The cabinet under the sink can act like a speaker box. No maker publishes a decibel figure for a disposal, so our guide to the quietest garbage disposals ranks on what makers do disclose: insulation, sink baffles, anti-vibration mounts and isolation from the drain pipes.
The microwave, in bursts
Four noises hide in one box: the beeps, the door, the hum of cooking and, on an over-the-range model, the vent fan. Our guide to the quietest microwaves sets out which models can be muted and how, and reads the certified sone ratings for over-the-range fans.
The air fryer, for 15 to 30 minutes at a time
Think of it as a small convection oven with a big fan, often running mid-conversation. Our guide to the quietest air fryers found no US maker that publishes an A-weighted, measured figure, and it sorts the claims that do exist into upper limits and single numbers, never ranking one kind against the other.
The ice maker, whenever it drops a batch
A plumbed ice maker inside a fridge fills with water and drops ice into its bin; the fridge guide above shows how to switch it off at night.
A countertop machine is different. Its compressor runs for hours, and our guide to the quietest countertop ice makers explains why a nugget machine, with its auger turning the whole time, tends to be rated louder than a bullet machine, and why some low claims do not add up.
A wine or beverage fridge, under the island
Our guide to the quietest wine fridges explains why an under-counter built-in unit needs front venting, and why thermoelectric is not automatically quieter.
Read the figure for the setting you will run
Makers quote their quietest setting. In an open-plan room, the setting that counts is the one running while people are in it, and that is rarely the quietest.
For a hood, the number on the box usually reflects the slowest speed, which is not the one you cook on. Look up the sone rating for whichever step delivers the airflow your cooktop calls for.
A dishwasher has many cycles and usually one figure, and most makers leave the cycle unnamed. A named cycle, or a quiet cycle with a figure of its own, tells you more.
Fridges are the vaguest. No maker in our fridge guide says which operating state its figure describes, so read a published number as the fridge settled, not the fridge cooling a full load of shopping.
Can you turn off appliance beeps and chimes?
Many can be switched off or muted. Some cannot. In a room you also relax in, the loudest moment of the evening can be a signal rather than a motor, so read the manual for that precise model ahead of buying.
Start with the dishwasher's end chime. Most in our open-plan guide let you turn it off, and several show the cycle status on the floor instead. On the fridge, see whether the door alarm's delay and volume can be set, or the alarm switched off altogether.
Microwaves vary the most. Some have a mute setting, some cannot be muted at all, and a few repeat a reminder until you open the door.
Then there is the hood's delayed shutoff. A long delay clears the air, and it also means the hood is still running when you sit down to eat.
dBA, sound power and sones are different quantities
Compare each one only with figures of the same kind.
An A-weighted reading, written dBA or dB(A), is a decibel figure adjusted to follow how people hear. Many makers print plain dB instead, and a plain dB figure should never be placed above or below a dBA one. The detail is in dBA explained.
Some makers, Miele among them, print sound power, given as dB(A) re 1 pW. It describes what the machine emits rather than the level at your ear. It looks like a dBA figure, it is a different quantity, and our guides never rank it against a plain dBA. The split between the two is laid out in sound power vs sound pressure.
Range hoods and over-the-range microwave fans are rated in sones. The sone scale is linear, so a 2 sone hood sounds double the loudness of a 1 sone hood, while the decibel scale is logarithmic. No simple, reliable conversion links them, which is why we never turn sones into decibels. Compare sones with sones, at the same speed or airflow, and see sones vs decibels for more.
Distance is the hidden variable. A maker rarely says how far away its microphone stood, and OSHA points out that sound loses less with distance indoors than in the open, because room surfaces bounce it back. Narrow differences between brands say little as a result. The rest is in why a fridge's dB rating from one brand cannot sit beside another's.
These figures rank kitchen products against each other, ideally inside one maker's sheet. They do not forecast what a meter would read from your sofa.
Few spec sheets name the setting behind the figure
Not one refrigerator we hold names it, and just four dishwashers do. The tallies cover every product on file on 26 October 2026, so models added since are not in them.
We went through the noise entry of all 40 refrigerators, 111 dishwashers and 13 microwaves in those files. Each entry quotes the maker's product page, spec sheet or manual, and each product counts once.
Thirty-six of the 40 refrigerators publish a figure for the model. The other 4 do not: Bosch offers only a sentence about the whole brand, and Perlick, Sub-Zero and U-Line print no number. None of the 36 says whether its figure covers a settled fridge, one cooling a fresh load of shopping, or a defrost. They also split into three groups that must not be mixed. Sixteen Liebherr models give a "Sound rating dB(A)" footnoted to EN 60704-3, three Miele models print sound power "re 1 pW", and 17 from Beko, Midea, Hisense and Summit print dB or dBA with no standard named.
Dishwashers do slightly better. Only 4 of the 111 tie the figure to a cycle: three Fisher & Paykel DishDrawers list noise "on standard cycle top drawer", and JennAir footnotes its range-wide 38 dBA with "Based on Normal Cycle." Cove hedges with "Model and cycle/option dependent".
ASKO alone prints a second figure for a quiet program, 39 dB(A) maximum and 37 dB(A) "with Night mode". Sixteen dishwashers, 15 from Miele and one from Gaggenau, print sound power re 1 pW, which cannot share a ranking with an unlabeled dBA.
Among the 13 microwaves, 6 have a maker-documented way to silence the beeps, from Breville's dedicated mute button to a Toshiba key held for about three seconds. Panasonic counts, although its manual allows the change only right after the oven is plugged in. The Galanz manual has no mute at all, and that oven keeps reminding you every 2 minutes that the food is ready until someone opens the door or touches a pad. For the remaining 6 we could not confirm a procedure from the maker, so check the manual before buying.
A plan for a quieter open-plan kitchen
Work from the timetable, check each figure against the setting that will really be running, and install every machine as its manual says.
- List what runs when: the fridge all night, the dishwasher after dinner, the hood while you cook.
- Start with the hood, since it runs while people talk and an island cooktop needs more airflow, which means a louder step.
- Read the figure for your setting: the hood's cooking step, the dishwasher's cycle, the fridge settled.
- Compare like with like, dBA with dBA, sound power with sound power, sones with sones.
- Move the noise with a delayed start so the dishwasher runs when the room is empty.
- Switch off the signals: end chimes, door alarms, keypad beeps and ice makers at night.
- Install to the manual, with level feet, the clearances the maker gives and nothing touching the cabinet.
Every figure in our guides comes from a maker or a certification body and is quoted with the setting it describes.
