SmartVolume

SmartVolume is an Android application that dynamically suggests a device volume setting based on the ambient noise level. Built with Kotlin and Jetpack Compose, it captures sound from the device's microphone for a user-selected duration, computes an estimated decibel level, and maps this value to a suggested volume percentage.

Features

• Ambient Noise Analysis:
  Records audio for a user-defined duration (between 1 and 30 seconds) to analyze the surrounding noise.

• Adaptive Volume Suggestion:
  Calculates a noise level (in dB) using a simple RMS algorithm and suggests a corresponding device volume level.

• Interactive UI:
  Built using Jetpack Compose, the UI includes:

  • A large, clear display of the current ambient noise level.
  • Sliders to adjust both the suggested volume and the recording duration.
  • A progress bar that indicates when audio analysis is in progress.
  • Buttons to analyze noise, confirm the volume setting, and reset the results.

• Permission Handling:
  Requests and handles microphone permissions appropriately to ensure smooth operation.

How It Works

1. Recording & Analysis:
   The app records audio from the microphone for a duration specified by the user. It continuously accumulates audio samples over this period and computes the RMS value to estimate the noise level in decibels.

2. Volume Mapping:
   Based on the computed decibel level, the app maps the value to a suggested volume level (e.g., low noise suggests 30%, moderate noise 50%, etc.). These thresholds can be adjusted for better calibration.

3. User Interaction:
   Users can view the ambient noise and the corresponding volume suggestion, adjust the volume via a slider, and apply the setting to their device.

Limitations & Future Improvements

• Calibration:
  The current decibel values are relative and may not represent true dB SPL without proper calibration against a known sound level.

• Signal Processing:
  Future improvements could include more advanced filtering and averaging to achieve a more accurate noise analysis.

• Mapping Adjustments:
  The thresholds mapping noise levels to volume settings are basic and may need adjustments based on further testing and user feedback.

Contributing

Contributions are welcome! Please open an issue or submit a pull request for any improvements, bug fixes, or new feature suggestions. For major changes, please discuss your ideas by opening an issue first. Thank you for helping improve SmartVolume!