Mobile speaker tools,
right in your browser.

Guide

How to use an online tone generator

A tone generator produces a single, steady frequency. That sounds trivial next to a music player, but a pure tone is the most useful test signal there is: it has one pitch, one loudness and no surprises, so whatever you hear on top of it — buzz, distortion, a sudden drop — is coming from the speaker, the room or your ears, not from the recording.

Picking a frequency

The slider is logarithmic, which matches how hearing works: the distance from 100 to 200 Hz is one octave, and so is 5 to 10 kHz. Drag for a rough value, or type an exact number in the box. The presets cover the jobs people come here for: 40 Hz to check whether a subwoofer or a big speaker actually moves air, 100 Hz as the bottom of what a mobile speaker can do, 165 Hz — the tone the popular water eject shortcut plays, 440 Hz concert A for tuning, 1 kHz as the standard reference level in audio measurement, 8 kHz for sibilance and harshness, and 15–17.4 kHz for the high-frequency hearing check most adults slowly fail.

Choosing a waveform

A sine wave is the pure tone — one frequency and nothing else. Use it for tuning, speaker checks and hearing tests. A square wave contains every odd harmonic and sounds hollow and electronic; it is much harsher at the same volume, so turn down before switching. A triangle wave has the same harmonics as a square but much quieter, so it sounds softer and rounder. A sawtooth contains every harmonic and is the brightest of the four — the classic synthesiser buzz. Square and sawtooth are useful when you want to hear a speaker's behaviour across many frequencies at once, or when you are looking for a rattle that a sine does not excite.

Everyday uses

• Tuning. Play 440 Hz and tune a string or a voice to it; the beating you hear slows down and disappears as you get closer.
• Finding a rattle. Slowly slide the frequency while something buzzes — a car panel, a shelf, a mobile case. The rattle peaks at one frequency; that is the resonance to fix.
• Checking a speaker or headphones. Sweep by hand from 20 Hz upward and note where the sound appears and whether it stays smooth. Pair it with the speaker test to compare left and right.
• Hearing check. At a low, fixed volume, find the highest frequency you can still hear. Most people lose the region above 15 kHz in their twenties and thirties; this is normal and not a reason to worry.
• Pests, "mosquito" tones and pets. High tones annoy people more than animals; there is no evidence that a mobile speaker repels insects. We mention it because people ask.

Why a browser is enough for tones, and not for speaker care

For generating a frequency, the browser is as accurate as any app — the Web Audio API produces the value you type, on your device, with no files involved. What a web page cannot do is control the mobile: it cannot pick the earpiece instead of the bottom speaker, cannot lock the volume at an exact level, and often stops when the screen turns off. The Wring app is built around those three things. It generates the same tones, but it also runs proper water eject and dust clean cycles at full volume, tests each speaker separately and keeps a health score — so if you came here because your mobile speaker sounds wrong rather than to tune a guitar, the app is the better tool, and the free water eject page is a good place to start right now.

Safety

Steady tones are more fatiguing than music at the same level, and high frequencies feel louder than they measure. Start at a low volume, especially with headphones or when switching to square or sawtooth, and keep sessions short. Everything on this page is generated locally; nothing is recorded or sent anywhere.