No, 45 dB is not loud. It is a quiet level, similar to a calm home during the day, light rain on a window, or a modern dishwasher running in the kitchen. Talking at a normal voice is effortless, and 45 dB is completely safe for hearing. It sits right on an important line for sleep, though: the World Health Organization uses 45 dB as the limit for single noise events inside a bedroom at night.
45 dB at a Glance
Quiet No. 45 dB is quiet, though it can disturb light sleepers at night.
- Sounds like
- A quiet home in the daytime, light rain
- Compared with conversation (60 dB)
- 1/3 as loud as conversation, with 1/32 the sound energy
- NIOSH safe time
- No limit: below the 85 dB(A) 8-hour level
- OSHA workplace limit
- No limit: below 90 dB(A)
Hear the 10 dB steps. Your speakers can't play a true 45 dB, but these three noise clips are exactly 10 dB apart, so you can hear how much louder each step is. Turn your volume down first.
How Loud Is 45 Decibels? Everyday Examples
| Sound | Typical level | Notes |
|---|---|---|
| Quiet home in the daytime | 40–45 dB | Distant traffic, a clock, a fridge |
| Light rain | 40–50 dB | Steady and often relaxing |
| Dishwasher rated “quiet” | 44–46 dB(A) | Typical of mid-range models |
| Refrigerator up close | 40–47 dB | Louder as the compressor starts |
| Desktop computer under load | 40–50 dB | Fans speed up as it heats |
| Birdsong in a garden | 40–50 dB | Depends on distance |
| Hospital room at night (typical) | 45–55 dB | Well above the WHO target of 30 dB(A) |
These ranges are typical A-weighted readings at the listener’s position; the exact figure depends on distance and the room. dB vs dB(A) explains why appliance ratings use A-weighting: it matches how the ear hears quiet sounds, where low frequencies are far less audible. A dishwasher label of 45 dB(A) counts as quiet, while 50 dB(A) and above can be heard from the next room. Room noise levels lists what is normal elsewhere in the home.
What 45 dB Sounds Like Compared With Other Levels
Forty-five decibels is half-way between the hush of a library and steady rain at 50 dB. Five decibels is a clearly noticeable change: most people can tell 45 dB from 40 dB side by side, and 45 dB sounds about 40% louder. Compared with normal conversation at 60 dB, 45 dB is roughly a third as loud. To hear exactly how big these steps are, try the volume level comparator, which plays two levels one after the other.
| Compared with | How loud 45 dB sounds | Physically |
|---|---|---|
| 35 dB | 45 dB is 2× as loud (+10 dB) | 10× the sound energy |
| 40 dB | 45 dB is 1.4× as loud (+5 dB) | 3.2× the sound energy |
| 50 dB | 45 dB is 71% as loud (−5 dB) | 1/3 the sound energy |
| 55 dB | 45 dB is 1/2 as loud (−10 dB) | 1/10 the sound energy |
| 60 dB | 45 dB is 1/3 as loud (−15 dB) | 1/32 the sound energy |
| 85 dB | 45 dB is 1/16 as loud (−40 dB) | 1/10,000 the sound energy |
Is 45 dB Safe?
At 45 dB there is no daily time limit: hearing damage becomes possible only with long exposure above 85 dB(A) (NIOSH). At 45 dB the relevant guidelines are about sleep and annoyance. The WHO Environmental Noise Guidelines for the European Region (2018) recommend keeping night-time road traffic noise outside homes below 45 dB Lnight, because higher levels are linked with disturbed sleep. The safe noise levels chart covers the hearing side.
Why 45 dB Is the Key Number for Sleep
Two WHO guidelines use 45 dB. For single events, such as a car door or a passing truck, the 1999 Guidelines for Community Noise recommend that indoor peaks in a bedroom should not exceed 45 dB(A) more than 10–15 times a night. For the overall night level outside the home, the 2018 guidelines set 45 dB for road traffic. Sounds above these levels were linked with waking, lighter sleep and next-day tiredness in the studies behind the guidelines.
In practice, if your bedroom is quiet but you keep waking, measure the peaks, not just the average. The noise monitor logs the level every second and lists every event above a limit you choose, so you can see whether trucks, neighbours or a boiler cross 45 dB during the night.
Is 45 dB OK for a Baby’s Room?
Yes. 45 dB is a comfortable level for a nursery and within the 45–50 dB(A) range used as the limit for hospital nurseries. The usual concern with babies is white noise machines: a 2014 study in Pediatrics tested 14 infant sleep machines and found that all of them exceeded the 50 dB(A) nursery limit at 30 cm on maximum volume, and three exceeded 85 dB(A). Keep the machine across the room at a low volume and check it with a meter. Baby room noise levels has the full guidance.
45 dB Appliances: What the Label Means
Dishwashers, range hoods, fridges and heat pumps often state their level in dB(A). About 45 dB(A) is typical of a quiet dishwasher or a good heat pump’s indoor unit. Every 3 dB lower halves the sound energy, and every 10 dB lower sounds about half as loud, so a 42 dB model is noticeably quieter than a 45 dB one. Use the decibel calculator to add appliance levels: two 45 dB machines running together make about 48 dB, not 90.
How to Measure 45 dB Yourself
You can check whether a sound really reaches 45 dB in about a minute with a phone or laptop:
- Open the sound decibel meter with the button in the box above and allow microphone access.
- Hold the device where your ears are, at arm’s length, and keep your fingers away from the microphone.
- Watch the A-weighted reading for 30–60 seconds and note the average (Leq), not only the maximum.
- For better accuracy, calibrate your microphone once against a known reference level.
Measuring 45 dB with a phone works, but you are close to the microphone’s own noise floor, so switch off other sounds, keep still and let the reading settle for at least 30 seconds. A quick microphone test confirms the browser is using the right microphone before you start.
Frequently Asked Questions
Is 45 dB loud for a dishwasher?
No. 45 dB(A) is quiet for a dishwasher; you will hear a faint hum in the kitchen but not over conversation. Models above 50 dB(A) are noticeably louder.
Is 45 dB loud at night?
It is quiet, but it is the upper limit for night-time sound in a bedroom. A steady 45 dB, such as a fan, is fine for most people; repeated peaks of 45 dB and above, such as traffic or doors, can disturb sleep.
Is 45 dB good for a refrigerator?
Yes, it is average. Most refrigerators run at 35–45 dB. A 45 dB fridge is audible in a quiet kitchen at night but not during the day.
How much louder is 55 dB than 45 dB?
About twice as loud, with 10 times the sound energy. 55 dB is the level of a coffee maker or a quiet conversation nearby.
Can you hear 45 dB through a wall?
Usually not. Walls between homes typically cut speech-range sound by 40–50 dB, so a 45 dB sound next door is inaudible, while a loud TV or party can still come through. See apartment noise complaint levels for what counts as too loud.
Addito is an audio analysis and sound measurement writer specializing in decibel testing, noise level analysis, sound frequency measurement, and audio engineering tools for creators, audio professionals, students, and everyday users. He creates practical content focused on sound measurement, hearing safety, microphone testing, and acoustic analysis tools.