Decibel Meter

As a rule of thumb, sounds at or below 70 dB are generally safe, while long or repeated exposure at or above 85 dB can gradually damage your hearing. Very loud sounds around 120 dB and up can cause pain and immediate harm. A simple real-world test is that if you have to shout to be heard, it is probably too loud. Open this free decibel meter to get a rough sense of where your surroundings fall, but remember a phone mic is not a calibrated SPL meter, so treat it as a relative guide.

Most hearing-health experts consider levels at or below 70 dB safe for everyday, long-term exposure. Above 85 dB the safe listening time drops quickly, and roughly every 3 dB louder cuts that safe time in half. The World Health Organization also suggests keeping personal listening to no more than about 40 hours a week at around 80 dB. Use this decibel meter to compare rooms or activities, but rely on a professional sound level meter for any decision that really matters.

Around 70 dB is moderate, everyday loudness, similar to a normal conversation, a television set turned up, or a vacuum cleaner heard from across the room. It is widely seen as the upper edge of comfortable, safe sound, though it can still feel irritating when you are trying to concentrate. Run this online decibel meter while a fan or TV is playing to see how close it reads to that level on your device.

Roughly 85 dB sounds like heavy city traffic or a noisy restaurant, and it is the level where hearing damage can begin with prolonged exposure. Around 100 dB is far louder, comparable to a chainsaw, a motorcycle, or loud machinery, and damage can start in as little as 15 minutes. Try this sound level meter near a blender or power tool to watch how quickly the reading climbs, keeping in mind it is an approximate guide.

At 85 dB the commonly cited safe exposure limit is about 8 hours, and that time roughly halves for every 3 dB increase, so 88 dB is around 4 hours and 91 dB about 2 hours. If readings on this decibel meter regularly sit in the high range, that is a strong hint to lower the volume, step back, or wear ear protection. For workplace or legal limits, use a calibrated meter rather than a phone.

A normal conversation between two people sits at roughly 60 dB, which is comfortably within the safe range for your hearing. A quiet room is closer to 30 to 40 dB, while a raised or animated conversation can push past 70 dB. Start this decibel meter and chat near your device to see where your own speaking voice tends to land on the live readout.

They are useful but not precise. Studies have found some well-tuned iPhone apps can land within a few dB of a reference meter, while Android results vary more because microphones and automatic gain differ between models. Typical errors fall in the range of a few dB in good conditions and can be larger on cheaper hardware. This browser-based decibel meter works the same way, so think of it as a check-engine light rather than a lab instrument and use it as a relative guide.

Yes, and you do not even need to install an app. This free decibel meter runs in your browser on iPhone, Android, tablets and laptops, turning your existing microphone into a live sound-level readout with min, max and average. Just keep in mind the phone mic is uncalibrated, so the numbers are approximate and best for comparing one sound or room against another rather than for certified measurements.

Find a steady spot, hold your device at arm’s length pointing toward the noise source, and let it run for at least 30 to 60 seconds so brief spikes average out. Keep the microphone uncovered and avoid blowing air across it, since wind and handling can throw off the reading. This online decibel meter makes that easy from any browser, but for official workplace assessments you will still want a calibrated, A-weighted sound level meter.

The simplest steps are to lower the volume, move away from the source, take quiet breaks, and use earplugs or earmuffs when noise is unavoidable. Reducing a sound by just 3 dB roughly halves the risk of hearing damage, and soft furnishings like rugs and curtains help absorb noise at home. Use this decibel meter to check whether a change actually made things quieter, and treat the readings as a helpful comparison rather than an exact figure.