Trinta segundos para ter certeza: esquerda, direita, centro, uma varredura completa e uma checagem de graves. Se os cinco se comportarem, seu áudio funciona — se um falhar, você sabe exatamente onde procurar.
Um canal está mudo ou fraco: balanço do sistema, cabo ou grade obstruída. O grave chia: sujeira ou vibração — o limpador de alto-falante cuida de poeira e água. A varredura soa irregular: meça com precisão no gerador de varredura completo e verifique se o extremo agudo são seus ouvidos, não o equipamento.
As ferramentas de diagnóstico: Headphone Test · Balance Test · Fix My Speaker · Sweep Generator · Hearing Age Test · Mic Test
Rode as checagens em ordem: Esquerda toca um tom só no canal esquerdo, Direita só no direito, Centro deve soar bem no meio, a varredura deve deslizar suavemente do grave ao agudo sem falhas, e o tom grave deve soar limpo, sem chiar. Trinta segundos e você sabe se o problema é o aparelho, as caixas ou um canal específico.
Em ordem: o volume físico e o mudo no aparelho e no sistema, a seleção do dispositivo de saída (aparelhos Bluetooth adoram roubar a saída em silêncio), o mudo da aba do navegador (clique direito na aba) e o cabo ou pareamento. Se outro site ou app toca som, a falha é por app; se nada toca, é do sistema.
Verifique primeiro o balanço nas configurações do sistema (ele desregula depois de algumas atualizações), depois o cabo — mexa nele junto ao plugue enquanto um tom toca; estalos indicam condutor rompido. Em fones intra-auriculares, a causa número um é o filtro entupido de cera. Só depois disso suspeite do driver. O caminho completo de diagnóstico está na página de teste de fones.
Buracos na varredura são frequências que seu equipamento (ou seus ouvidos, no extremo agudo) não reproduz — normal em caixas pequenas abaixo de 100 Hz. Chiado no tom grave significa que algo está vibrando: um fio no diafragma, grade solta ou móvel ressoando. Limpe a grade, isole a caixa e teste de novo.
Generate single tones with precise frequency control. Perfect for quick audio testing and tuning.
Play multiple frequencies simultaneously with independent volume and panning controls.
Create linear or exponential frequency sweeps for speaker testing and room acoustics analysis.
Generate binaural beats for meditation, focus, and relaxation. Requires headphones for proper effect.
Generate telephone dial pad tones (Dual Tone Multi Frequency). Interactive touch-tone dial pad.
Professional metronome with tap tempo, time signatures, subdivisions, and tempo trainer for musicians.
Tap along to any song to find its tempo in beats per minute. Includes tempo markings reference.
Hear major, minor, diminished, and seventh chords in every key. Block chords or arpeggios.
Hear classic progressions like I-V-vi-IV and 12-bar blues in any key at any tempo.
Free browser piano with 3 octaves, note names, and computer keyboard support.
Generate white, pink, and brown noise for sleep, focus, tinnitus relief, and speaker burn-in.
Reference tuning notes for guitar, bass, ukulele, violin, cello, and more at concert pitch (A440).
Test your subwoofer with a 60-second frequency sweep (150Hz-1Hz) and individual bass test tones.
Test your hearing range from 8kHz to 20kHz. Find your hearing age and compare with averages.
Ancient healing tones including 528Hz (DNA repair). For meditation, chakra activation, and spiritual healing.
Test stereo balance with panning control and left/right channel testing. Perfect for speaker setup.
Check speaker wiring polarity by comparing in-phase and out-of-phase test signals.
Measure your Bluetooth or system audio delay in milliseconds with a click-and-flash sync test.
Real-time frequency analysis of your microphone input with a live log-frequency display.
Measure approximate sound levels with your microphone - live dB with min/avg/max tracking.
Check your microphone in seconds: live waveform, level meter, and record-and-playback check.
Learn to recognize musical intervals by ear with quiz mode, score tracking, and song mnemonics.
Chromatic pitch pipe with all 12 notes across 3 octaves. Perfect for singers, choirs, and a cappella groups.
Experience the auditory illusion of an infinitely ascending or descending tone. Mind-bending psychoacoustic phenomenon.
Can you hear the mosquito tone? High-frequency test (15-20kHz) that only young people can hear. Find your hearing age!
Create relaxing ambient soundscapes with singing bowls, nature sounds, and binaural beats.
Three sound modes to clean a muffled speaker: 165 Hz water eject, dust-shaking sweeps, and vibration.
Push water out of a wet phone or watch speaker with a pulsed 165 Hz tone - the same method Apple Watch uses.
Adjustable high-frequency whistle (8-22 kHz) for dog training - clearly audible to dogs, silent to most adults.
Rhythmic pulsed tones across delta to gamma ranges. Stronger than binaural beats and works without headphones.
Name 12 random notes with no reference tone and find out if you have absolute pitch or great pitch memory.
Sing your lowest and highest notes and get your range plus voice type - bass to soprano. Mic-based, nothing uploaded.
Find the highest frequency you can hear (8-20 kHz) and see how old your ears test. Takes one minute.
Instant karaoke via center-channel cancellation - free, unlimited, and processed locally.
Record from your microphone and download as WAV - no signup, nothing uploaded.
Normalize any file to a LUFS target with true-peak protection instead of silent clipping.
16-step beat maker with synthesized 808-style drums, swing, and shareable pattern links.
Drop a file and get integrated LUFS, true peak, RMS, and a waveform - measured locally, nothing uploaded.
Microphone tuner with a cents needle - play any note on any instrument and tune to ±5 cents.
Five-minute headphone checkup: channels, wiring polarity, bass and treble reach, and driver distortion.
Send noise to each 5.1 channel - fronts, center, surrounds, and subwoofer - and catch swapped or dead speakers.