SPL Meter is a sophisticated sound level meter designed for iPhone, iPad, and iPod touch users. This application provides a professional-grade measurement of sound levels, accurately modeled after traditional analog SPL meters. It features advanced DSP-based algorithms that comply with ANSI / IEC Type 1 standards, ensuring precision in sound level readings. Users can take advantage of various features including A and C weighting filters, adjustable decay rates, and a wide measurement range from 40dB to 120dB across nine ranges.

The app includes a user-friendly digital LCD display that enhances usability by flipping the screen orientation when the device is turned. SPL Meter is compatible with both internal and external microphones, allowing for enhanced measurement capabilities. It comes pre-calibrated for typical iOS device microphones, with options for user calibration against professional standards. Overall, SPL Meter is a valuable tool for audio professionals and enthusiasts alike, offering a comprehensive solution for sound level measurement.