# Decibel Core: SPL & Dosimeter > NIOSH Dosimeter, Noise Exposure Reports, Real-time FFT & SPL Meter. Canonical page: [https://chrome-stats.com/d/com.zenblock.soundcore](https://chrome-stats.com/d/com.zenblock.soundcore) ## Overview - **ID:** `com.zenblock.soundcore` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Zentools - **Category:** TOOLS - **Downloads:** 439 - **Version:** 1.7.6 - **Last updated:** 2026-01-18 - **First published:** 2026-01-07 - **Publisher country:** PL - **Size:** 52 MB - **Data as of:** 2026-09-12 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.zenblock.soundcore) - **Privacy policy:** [https://sites.google.com/view/decibelcoreprivacy/home](https://sites.google.com/view/decibelcoreprivacy/home) ## Description Occupational Noise Screening & Acoustic Analysis.

Decibel Core is a comprehensive Noise Screening Tool. Designed for safety officers, industrial hygienists, and audio engineers, Decibel Core combines a real-time SPL meter with a NIOSH/OSHA compliant noise dosimeter calculator.

Generate PDF reports, track Time-Weighted Average (TWA), and analyze frequency spectrums for initial noise assessments.

NOISE DOSIMETRY SCREENING
Turn your phone into a safety awareness tool. Monitor noise risk and screen workplace noise levels.
• NIOSH & OSHA Standards: Calculates dose based on NIOSH (85dB/3dB exchange) and OSHA (90dB/5dB exchange) formulas.
• TWA & Dose %: View real-time noise dose percentages and projected 8-hour exposure.
• Risk Thresholds: Visual alerts for Safe (<85dB), Caution (85-94dB), and Danger (>=105dB) zones.

REPORTING & LOGGING
Ideal for preliminary workplace assessments and environmental monitoring.
• PDF Export: Generate detailed TWA reports with graphs and session statistics.
• Data Logging: Record measurements with timestamps and export to CSV.
• Leq Tracking: Monitor Equivalent Continuous Level (Leq) for fluctuating noise sources.

REAL-TIME FFT ANALYSIS
Identify frequency peaks in noise sources.
• Frequency Analysis: 2048-point FFT with Hamming window.
• Weighting Filters: Support for A-Weighting, C-Weighting, and Z-Weighting.

MICROPHONE CALIBRATION
Smartphone microphones vary by manufacturer. Decibel Core includes a Multi-Point Calibration engine to help align your device with reference equipment.
• Linear Regression: Adjusts slope and offset for better alignment.
• Adaptive Presets: Quick settings for common microphone profiles.

IMPORTANT: HARDWARE LIMITATIONS
Please Read Before Downloading:
Decibel Core is a software tool, but it is limited by the physical hardware of your smartphone's microphone.

1. Hardware Clipping: Most smartphone microphones physically stop measuring (clip) above 90dB - 105dB. This is a hardware limit, not a software error. This app cannot measure sounds louder than your device's hardware allows.
2. Voice Optimization: Phone microphones are tuned for human voice frequencies. They may not be accurate for very low bass or very high frequency industrial noise.
3. Screening Use Only: This app is intended for screening (identifying potential issues) and educational use.

TECHNICAL SPECS
• Calculations: Based on IEC 61672-1 weighting and NIOSH/OSHA dose formulas.
• Audio Engine: 44.1 kHz 16-bit PCM input.

DISCLAIMER
This application is for informational and screening purposes only.
• Not a Class 1 Device: This software is NOT a substitute for a calibrated ANSI/IEC Class 1 Sound Level Meter for official regulatory, legal, or occupational safety compliance.
• Accuracy: Without external calibration, smartphone readings may vary significantly from professional equipment.
• Liability: The developer assumes no responsibility for decisions made or hearing damage sustained based on this data. Always verify critical measurements with certified equipment. ## Rankings - #1,426,248 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.INTERNET` - `android.permission.MODIFY_AUDIO_SETTINGS` - `android.permission.READ_EXTERNAL_STORAGE` - `android.permission.RECORD_AUDIO` - `android.permission.SYSTEM_ALERT_WINDOW` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `android.permission.WRITE_EXTERNAL_STORAGE` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.zenblock.soundcore.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Noise Analyzer Pro](https://chrome-stats.com/d/com.noiseanalyzerpro.noise_analyzer_pro) — 4 users - [DecibelPro: Sound Level Meter](https://chrome-stats.com/d/ai.noxera.decibel_pro) — 771 users - [Sound Meter: Decibel dB Meter](https://chrome-stats.com/d/com.simonj.noisemeter) — 13,539 users - [Noise Alert](https://chrome-stats.com/d/com.noisealert) — 594 users - [Decibel - Sound Level Meter](https://chrome-stats.com/d/com.decibel.app) — 267 users - [Sound Meter Report](https://chrome-stats.com/d/com.gitdevworld.soundmeterreport) — 758 users - [Sound Basics & Decibel Meter](https://chrome-stats.com/d/com.easyengineeringapps.soundbasics) — 37 users - [DR-SoundMeter](https://chrome-stats.com/d/pl.dronline.soundmeter) — 33 users - [Smart Sound Meter](https://chrome-stats.com/d/com.hdlabs.soundmeter) — 23 users - [Decibel Meter - Noise Detector](https://chrome-stats.com/d/com.wantj_tech.decibelmeter) — 38 users - [Noise Test](https://chrome-stats.com/d/com.noise.sounddetection) — 7 users - [Decibel Defender: Sound Meter](https://chrome-stats.com/d/com.decibeldefender.decibel_defender) — 17 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.zenblock.soundcore)