Privacy Policy
Last Updated: January 2025
Introduction
Welcome to our free online decibel meter tool. This privacy policy explains how we handle your information, particularly regarding audio data processing and privacy protection measures. We are committed to protecting your privacy and ensuring your data security.
🎤 Audio Data Processing (Important)
How We Handle Audio Data
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Local Processing Principle
- All audio processing occurs entirely within your browser locally
- Uses Web Audio API technology for real-time analysis
- Audio data never leaves your device
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No Recording, No Storage, No Upload
- ❌ We do not record any audio content
- ❌ We do not store any audio files
- ❌ We do not upload audio data to servers
- ✅ Only real-time numerical calculations (decibel values)
-
Transparent Data Flow
Microphone → Browser Audio Processing → Decibel Display → Data Discarded
Throughout this process, only decibel values are calculated and displayed; the audio itself is immediately discarded.
🔐 Microphone Permission Usage
Purpose of Permission Request
- Sole Purpose: Capture environmental noise for decibel measurement
- Real-time Processing: Only access microphone during measurement periods
- User Control: You can deny or revoke microphone permission at any time
Permission Management
- First-time use will request microphone permission
- You can revoke permissions in your browser settings at any time
- Revoking permission will stop the tool from working but won't affect your other data
📊 Other Data Collection
1. Usage Statistics (Anonymous)
- What We Collect: Page views, usage duration, device types
- Purpose: Improve tool performance and user experience
- Anonymization: Cannot identify individuals
- What We Collect: Browser type, operating system, screen resolution
- Purpose: Ensure tool compatibility and optimize display
3. Cookies Usage
- Functional Cookies: Remember your preferences (theme, language)
- Analytics Cookies: Help us understand tool usage patterns (optional)
🛡️ Data Security Measures
Technical Protection
- HTTPS Encryption: All data transmission is encrypted
- Local Processing: Sensitive audio data is never uploaded
- Minimization Principle: Only collect necessary technical information
Privacy by Design
- Code Transparency: Core functionality code available for review
- No Account Required: No registration or login needed to use the tool
- Instant Exit: All processing stops immediately when you close the page
👤 Your Rights
Data Control Rights
- Access Rights: Understand what types of data we process
- Deletion Rights: Request deletion of your usage records (if any)
- Revocation Rights: Revoke microphone and other permissions at any time
Privacy Controls
- Browser Settings: Manage permissions and cookies through your browser
- Opt-out Options: Choose to opt out of analytics statistics
🌍 Third-Party Services
We may use the following third-party services to improve user experience:
- Website Analytics: Google Analytics (anonymous statistics)
- CDN Services: Improve website loading speed
- Error Monitoring: Help us fix technical issues
These services all follow strict privacy standards and do not access your audio data.
📱 Mobile Device Considerations
When using on mobile devices:
- Microphone permissions are managed by the device operating system
- You can view and manage permissions in device settings
- Audio processing performance may vary by device, but privacy protection standards remain the same
🔄 Policy Updates
We may periodically update this privacy policy to reflect:
- Feature improvements and new capabilities
- Changes in laws and regulations
- User feedback and suggestions
Major changes will be announced through website notifications.
If you have any questions or suggestions about this privacy policy, please contact us:
Legal Statement
Using this decibel meter tool indicates your agreement with the terms of this privacy policy. We commit to protecting your privacy rights in accordance with this policy.
This policy is developed in compliance with international privacy protection standards including GDPR, CCPA, and others. We are committed to providing transparent and secure services to users worldwide.