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.