Privacy Policy

Last Updated: May 31, 2026

Introduction

Welcome to our free online decibel meter tool. This privacy policy explains how we handle microphone audio, browser permissions, analytics, advertising, and other technical data used to operate and improve the site.

🎤 Audio Data Processing (Important)

How We Handle Audio Data

1. 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

2. 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)

3. 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

• What We Collect: Page views, approximate usage duration, device/browser type, referrer, approximate location derived from network data, and interaction events
• Purpose: Improve tool performance, understand which pages are useful, and detect technical issues
• Important Limit: Usage analytics do not include microphone audio or audio recordings

2. Technical Information

• What We Collect: Browser type, operating system, screen resolution, language, and basic error or performance signals
• Purpose: Ensure tool compatibility and optimize display

3. Cookies Usage

• Functional Cookies: Remember your preferences (theme, language)
• Analytics Cookies: Help us understand aggregate site usage patterns
• Advertising Cookies: May support ad delivery, frequency limiting, fraud prevention, and ad measurement when ads are enabled

🛡️ 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: Use your browser privacy controls, ad settings, or provider opt-out tools to limit analytics and advertising cookies

🌍 Third-Party Services

Depending on the production configuration and your region, this site may load the following third-party services:

• Google Analytics: Measures page views, traffic sources, device/browser information, and site interactions.
• Google AdSense / DoubleClick: Serves and measures ads, limits ad frequency, helps prevent ad fraud, and may use advertising cookies or identifiers.
• Microsoft Clarity: Provides usability analytics such as page interactions, scrolling, clicks, and session replay-style diagnostics when enabled.
• OpenPanel: Provides product analytics such as screen views, attributes, and outgoing link events when enabled.
• Plausible: Provides privacy-focused traffic analytics when enabled.
• CDN and hosting services: Deliver pages and assets, protect availability, and improve loading speed.

These services may process page URLs, referrers, IP-derived region, device and browser information, cookie identifiers, advertising identifiers, and interaction events according to their own privacy policies. Third parties do not receive microphone audio from the meter. We do not send microphone audio, audio recordings, or audio files to analytics or advertising services.

Retention and Opt-out Guidance

• Retention: Analytics and advertising retention periods are controlled by the relevant providers and the site's configured settings. Aggregated reports may be retained to understand long-term site performance.
• Browser Controls: You can block or delete cookies, revoke microphone permission, and limit cross-site tracking in your browser settings.
• Google Controls: You can manage personalized ads through Google Ad Settings and use Google's browser opt-out tools where available.
• Microsoft Controls: Microsoft privacy controls and browser tracking protections may limit Clarity processing where available.
• Other Analytics Controls: Browser tracking protection, content blockers, and provider-specific opt-out tools may limit OpenPanel or Plausible tracking where enabled.
• Consent Controls: Where legally required, analytics and advertising cookies may be subject to a consent prompt or regional consent controls. Your choices can affect analytics and ad personalization, but they do not change the meter's local audio processing.

📱 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.

📞 Contact Us

If you have any questions or suggestions about this privacy policy, please contact us:

• Email: support@decibelmeter.org
• Feedback: Website feedback form

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 intended to provide transparent information for users worldwide. Privacy rights and available controls may vary by location.