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SPÉCIFICATIONS AUDIO NUMÉRIQUE AES17

Teste de Graves de Subwoofer (10Hz a 200Hz)

Testez la réponse des basses, la coupure basse (20Hz–200Hz) et les vibrations du caisson grâce à des balayages sinusoïdaux logarithmiques.

WEB AUDIO SYNTHESIZER & SPECTRUM SCOPE
Pronto
FREQ: 440 Hz|VOL: 80%
W3C WEB AUDIO API 48kHz
FREQUENCY SELECTOR440 Hz
OUTPUT GAIN / VOLUME80%
PROTOCOLO DE DIAGNÓSTICO

Como Executar Este Teste de Tela (01, 02, 03)

01

Preparação

Limpe a superfície do monitor, desative sensores de luz ambiente e defina a resolução e taxa de atualização nativas.

02

Execução

Entre no modo de tela cheia (F11) e use os controles para navegar pelos padrões de teste.

03

Avaliação

Observe anomalias de diferentes ângulos de visão em um ambiente escuro. Consulte nossos guias para interpretar os resultados.

ARQUITETURA DE HARDWARE

Comparativo de Tecnologias de Painel

IPS Profissional (In-Plane Switching)

Precisão de cores e ângulos de visão superiores. Usado em monitores de referência. Sujeito a leve brilho IPS no escuro.

IPS Gamer (Fast IPS / Nano IPS)

Altas taxas de atualização e tempos de resposta rápidos para jogos, porém contraste estático menor que o VA.

Painel VA (Alinhamento Vertical)

Excelentes pretos profundos e alto contraste (3000:1+). Comum em telas curvas. Pode apresentar black smearing em movimento rápido.

OLED (LED Orgânico) e QD-OLED

Pixels autoiluminados proporcionam preto puro, tempos de resposta quase instantâneos e contraste infinito. Sujeito a ABL.

RÉPONSE EN FRÉQUENCE ACOUSTIQUE

Coupure du Caisson, Accord d'Évent et Acoustique des Infrasons

La reproduction des basses fréquences demande une grande excursion mécanique et une forte puissance. Nos balayages logarithmiques passent de 100Hz à 10Hz inaudibles pour tester les coupures et résonances.

Plage Sub-Basses20 Hz – 60 Hz

Vibrations tactiles produites par les caissons actifs et casques magnétiques planaires.

Coupure THX 80 HzRelais Satellites

Seuil standard où les enceintes satellites transfèrent les basses fréquences au caisson.

Modes de PièceRéflexion des Murs

Identifie les ondes stationnaires et creux acoustiques générés par les murs parallèles.

Technical FAQs & Helpful Content

FAQ Caisson de Basses & Fréquences Graves

Tudo o que você precisa saber sobre este instrumento de diagnóstico, procedimentos de calibração e normas técnicas.

01.How do I test my subwoofer low-frequency cutoff (extension limit)?
Our bass sweep transitions from 100Hz down to sub-audible 10Hz. Listen for the point where volume drops dramatically or disappears completely to find your subwoofer's low-end limit.
02.What is the frequency range of human sub-bass perception?
Human hearing perceives deep bass starting at ~20Hz up to 60Hz as tactile physical vibrations. Frequencies below 20Hz (infrasound) are felt as room air pressure shifts.
03.What causes speaker cabinet rattling or buzzing during heavy bass sweeps?
Bass rattles are caused by loose cabinet enclosures, unsealed port tubes, vibrating desk surfaces, or driver voice coils exceeding linear excursion limits (Xmax).
04.How do room acoustic modes and standing waves distort bass sound?
Parallel walls reflect low-frequency soundwaves, creating standing wave nodes (bass buildup) and anti-nodes (bass dead zones) at specific seating positions.
05.What is the recommended subwoofer crossover frequency for studio monitors?
The THX standard crossover frequency is 80Hz. Frequencies below 80Hz are routed to the dedicated active subwoofer, freeing main speakers from heavy cone excursion.
06.Can laptop or mobile phone speakers play 20Hz sub-bass tones?
No. Micro-speakers in laptops and smartphones physically cannot move enough air volume to reproduce frequencies below 150Hz–200Hz.
07.What is subwoofer phase alignment (0° vs 180°)?
Phase alignment ensures your subwoofer cone pushes forward simultaneously with main speaker woofers. Out-of-phase subwoofers cancel out bass at the crossover point.
08.Why does uncompressed Web Audio sine sweep produce cleaner bass than YouTube videos?
YouTube applies lossy AAC/OPUS compression that truncates sub-20Hz low end and adds phase distortion. Web Audio API generates uncompressed pure 64-bit mathematical sine waves directly in RAM.
09.How do I locate the optimal subwoofer position in my room ('sub crawl')?
Place the subwoofer at your main listening position, play a 40Hz bass sweep, and crawl along the floor near room boundaries to find where the bass sounds cleanest and punchiest.
10.Is playing 10Hz to 20Hz sub-bass sweeps safe for high-end subwoofers?
Yes, provided volume is set at moderate listening levels. Avoid excessive amplification on ported subwoofers below their tuning frequency to prevent driver unloading.
Não tem certeza de qual teste executar a seguir? Precisa de ajuda com problemas?
Ler Guia Completo de Diagnóstico →
PASS

EXTENSION DES BASSES OK

Transducteur Basse Fréquence

20.0/Hz
Limite Sub-Basses20 Hz (Propre)
Relais Fréquence80 Hz THX

Métriques du Caisson

Télémétrie Basse Fréquence

Balayage 10-100Hz
Fréquence Grave Actuelle
60Hz
Coupure Inaudible
20Hz
Relais de Coupure THX
80Hz

Contrôles du Balayage

Plage et Signal des Basses

Controls
70 %

Shortcuts

Keyboard Navigation

Hotkeys
B
Déclencher Impulsion 20Hz
Space
Lecture / Pause Balayage
R
Réinitialiser le Balayage
TV users can navigate with D-Pad & Remote arrow keys
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