mimigarKEEN

KEEN is an ultrasonic sound pressure level (SPL) meter that measures the 18–20 kHz band — sound at the upper edge of human hearing.

Connect a Dayton Audio iMM-6C measurement microphone to your phone's USB-C port and KEEN measures ultrasonic SPL in real time.

Features:
• Band-limited SPL measurement of the 18–20 kHz range
• Direct USB microphone drive (48 kHz) with AAudio fallback
• Automatic download and application of per-unit calibration data for iMM-6C microphones
• Manual import of calibration files
• Fast / Slow time weighting (IEC 61672 time constants)
• Simple real-time display of the measured level

Notes:
• An external measurement microphone (such as the Dayton Audio iMM-6C) is required for accurate readings.
• This app is intended for testing and evaluation purposes.