Sound Level Meter - dB & Audio

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About this app

🔊 Smart Sound Level Meter - Real-Time dB Meter & Audio Reference Recorder

Accurately measure real-time sound pressure levels (SPL) and record synchronized audio reference logs using your smartphone's high-precision microphone. 100% on-device and privacy-focused!

Featuring an innovative 180° auto-flip screen mode, point the bottom microphone towards ceilings (apartment floor noise), walls, or windows to measure sound comfortably while viewing decibel numbers right side up. Built-in audio denoise filtering and keep-screen-on features guarantee clear, stable noise monitoring.

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🌟 Key Features of Sound Level Meter
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1️⃣ 📟 Live View: Large Digital dB HUD & Real-Time Oscilloscope Waveform
• High-contrast 000.0 dB digital readout for instantaneous noise level checks without saving.
• Real-time sound oscilloscope waveform captures impact thumps and continuous noise instantly.
• Live Min, Avg, and Max/Peak decibel statistical tracking.
• Color-coded safety indicators (Safe, Normal, Caution, Warning, Danger).

2️⃣ 🎙️ Record & Log: Synchronized Audio & Measurement Data
• Synchronize live decibel readings and microphone audio safely on-device as an objective reference log.
• 10-minute auto-safe timer protects device storage while providing immediate playback upon completion.
• Easy one-tap file sharing via email, messaging apps, or cloud storage.

3️⃣ 📱 180° Auto-Flip Screen Mode (Ceiling & Wall Measurement)
• When tilting the bottom microphone upward toward ceilings or walls, the screen automatically rotates 180°.
• Read numbers right side up without twisting your neck or hands.
• Manual 180° toggle button available on the top bar.

4️⃣ 📊 Environmental Noise Guideline Comparison HUD
• Real-time overlay comparing current noise against standard residential guideline thresholds (Daytime / Nighttime).
• Instantly identify whether surrounding noise exceeds typical indoor and outdoor levels.

5️⃣ 📂 History Vault & Local Storage
• Timestamped measurement records and audio files stored securely in a 100% on-device Room DB.
• Instant one-tap filtering between [All Records] and [Audio Logs].
• Zero external server transmission—complete offline capability and total privacy.

6️⃣ ℹ️ Acoustic Guide & Reference Notice
• Device Margin of Error: Measures physical sound pressure level (dB SPL, approx. ±5 dB error margin).
• Note on Legal Standards: Official environmental standards use frequency A-weighting (dB(A)), which may differ from raw SPL values.
• Practical Reference Material: Data and recordings serve as preliminary reference materials to help agencies identify noise patterns and timings.

Download Sound Level Meter today for accurate, hassle-free noise monitoring!

What’s new

• 글로벌 19개 언어 100% 완전 현지화 지원 (영어, 일본어, 스페인어, 독일어, 베트남어 등)
• 소음 기준치 초과 알림 및 상단바 푸시 다국어 지원
• 측정 기록 보관함 요약 및 필터 인터페이스 다국어 최적화
• 기기 로케일 변경 시 실시간 언어 동기화 개선
• 소음 계측 엔진 반응 속도 및 앱 안정성 향상