저음이 진짜로 끊기는 곳을 찾으세요. 20~100Hz 고정 톤 7개와 느린 저역 스윕 — 깨끗하게 들리는 가장 낮은 톤이 기기의 진짜 하한입니다.
⚠ 작은 볼륨부터 시작하세요. 큰 볼륨의 지속 저음은 서브우퍼 바닥치기와 소형 유닛 과열을 일으킬 수 있습니다.
톤이 무음: 기기 범위 아래입니다 — 서브우퍼 없이 20~40Hz가 안 들리는 것은 정상. 톤이 다음 단계보다 높게 들림: 기본음이 아니라 고조파 왜곡을 듣고 있는 것입니다. 떨림·달그락거림: 무언가 헐겁습니다 — 유닛, 그릴, 또는 가구. 스윕의 한 지점은 크고 다른 지점은 죽음: 룸 모드 — 방의 성질이지 스피커 결함이 아닙니다.
더 깊이: Subwoofer Test · Bass Tone Generator · Room Mode Calculator · Fix My Speaker · Sound Test
대략적인 기준: 노트북 스피커는 150~200Hz 부근에서 한계. 소형 블루투스 스피커는 80~100Hz. 괜찮은 북셸프 스피커는 50~60Hz. 좋은 오버이어 헤드폰은 20~30Hz를(작지만 들리게) 재생. 진짜 서브우퍼는 25~30Hz를 깨끗하게 내야 하고 많은 제품이 20Hz까지 갑니다. 스펙보다 두 단계 위의 톤이 무음이면, 하드웨어를 탓하기 전에 볼륨과 배치를 확인하세요.
들리는 것은 거의 확실히 20Hz가 아니라 고조파 왜곡입니다. 작은 유닛을 재생 범위 아래로 밀어붙이면 40·60·80Hz의 배음이 생기고, 뇌는 그것을 "낮은 음"으로 받아들입니다. 빠른 확인법: 20Hz "톤"이 40Hz 톤과 비슷한 높이로 들리면 왜곡을 듣고 있는 것입니다.
룸 모드입니다: 저주파의 파장은 수 미터에 달해 평행한 벽 사이에서 반사되며, 파동이 쌓이는 곳(웅웅거림)과 상쇄되는 곳(죽은 지점)을 만듭니다. 방의 성질이지 스피커 결함이 아닙니다. 룸 모드 계산기로 문제 주파수를 찾고 실제 청취 위치에서 테스트하세요.
볼륨 4분의 1 정도에서 시작해 서서히 올리세요. 낮은 주파수는 측정치보다 작게 느껴집니다 — 등청감 곡선에 따르면 40Hz가 1kHz만큼 크게 들리려면 훨씬 많은 에너지가 필요합니다. 그래서 모르는 사이에 소형 스피커를 왜곡시키거나 서브우퍼를 바닥치게 하기 쉽습니다. 그릴이 달그락거리고 패널이 웅웅대면 줄이라는 신호입니다.
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.