30초면 확실해집니다: 왼쪽, 오른쪽, 센터, 풀 스윕, 저음 점검. 다섯 가지가 모두 정상이면 오디오는 문제없음 — 하나라도 실패하면 어디를 봐야 할지 정확히 알 수 있습니다.
한쪽이 무음이거나 약하면: OS 밸런스, 케이블, 막힌 그릴을 확인하세요. 저음이 떨리면: 이물질이나 진동 — 스피커 클리너가 먼지와 물을 처리합니다. 스윕이 고르지 않게 들리면: 풀 스윕 제너레이터로 정확히 측정하고, 고음 끝은 기기가 아니라 귀 때문일 수 있으니 확인하세요.
진단 도구: Headphone Test · Balance Test · Fix My Speaker · Sweep Generator · Hearing Age Test · Mic Test
점검을 순서대로 실행하세요: 왼쪽은 왼쪽 채널에서만, 오른쪽은 오른쪽에서만 톤이 나오고, 센터는 정확히 가운데에 맺혀야 하며, 스윕은 끊김 없이 저음에서 고음으로 매끄럽게 이어지고, 저음 톤은 떨림 없이 깨끗해야 합니다. 30초면 문제가 기기인지, 스피커인지, 특정 채널인지 알 수 있습니다.
순서대로: 기기와 OS의 물리 볼륨/음소거, 출력 장치 선택(블루투스 기기가 몰래 출력을 가로채는 일이 잦습니다), 브라우저 탭 음소거(탭 우클릭), 케이블이나 페어링. 다른 사이트나 앱에서 소리가 나면 앱 단위 문제, 아무것도 안 나면 시스템 문제입니다.
먼저 OS 밸런스 설정을 확인하고(업데이트 후 어긋나기도 합니다), 다음은 케이블 — 톤을 재생하며 플러그 부근을 흔들어 보세요. 지직거리면 단선입니다. 이어폰이라면 귀지로 막힌 필터가 최다 원인. 그다음에야 유닛을 의심하세요. 전체 진단 경로는 헤드폰 테스트 페이지에 있습니다.
스윕의 빈 구간은 기기(고음 끝이라면 귀)가 재생할 수 없는 주파수입니다 — 작은 스피커에서 100Hz 이하가 안 들리는 것은 정상. 저음 톤의 떨림은 무언가 진동한다는 뜻: 진동판의 머리카락, 헐거운 그릴, 공진하는 가구. 그릴을 청소하고 스피커를 떨어뜨려 놓고 다시 테스트하세요.
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.