FreqCheck : See Sound

What's New in Version 3.0.3 iPad Log Fix & UI Refinements Resolves an issue preventing PDF log exports on iPad. Take full advantage of the larger canvas with a desktop-class Tactical Dashboard, giving your real-time FFT spectrum, multi-shot DPS sequences, and high-contrast SPL readouts the expansive visual real estate they deserve for true lab-bench analysis in the field. Raw 384.0 kHz Hardware Integration & 65k-Point FFT Building upon Tactical Wideband Metrology, FreqCheck now unlocks up to raw 384.0 kHz hardware sampling to support extreme 192.0 kHz high-frequency acoustic auditing. Powered by a new dynamic 65,536-point FFT architecture, the engine automatically scales up to deliver enterprise-grade spectral resolution at maximum hardware clock speeds. Complete with a massive digital meter displaying live Sound Pressure Level (SPL) and precise Peak Hold captures, this update transforms your iOS device into an industrial-grade spectrum analyzer with unprecedented metrology horsepower. Dynamic Pulse Sequence (DPS) & MIL-STD-1474E Blast Averaging Dynamic Pulse Sequence (DPS) introduces rigorous MIL-STD-1474E compliant metrology to calculate true energetic logarithmic averages across multi-round blast series and impulsive acoustic events. Because decibels are logarithmic representations of physical sound pressure, traditional arithmetic means severely underestimate the true physical energy delivered to human ears or blast gauges. DPS converts each discrete peak back into linear acoustic mean-square pressure, averages the physical energy, and computes the correct equivalent energy mean level (Lavg). Configurable pulse counts (3 to 10 events), adjustable threshold sensitivity gates (e.g., >130 dB floor to filter out ambient range chatter or noise), and customizable anti-echo lockout windows (0.5s, 1.5s, or 3.0s to eliminate secondary ground and berm reflections) ensure flawless field automation. Whether testing heavy ordnance, firearm suppressors, or industrial drop hammers, every multi-round session automatically aggregates into a unified sequence report featuring absolute peak levels (Lpk, max), energetic averages (Lavg), a detailed per-shot breakdown table, and a combined SHA-256 cryptographic sequence hash for tamper-evident proof. Pro Input Mode (PIM) Bridging & Hardware DC Block Integrated with Pro Input Mode (PIM), the system incorporates dedicated input channel selection (Left, Right, Auto), combined with manual overrides for ADC voltage ceilings, sensor sensitivity (mV/Pa), and dual hardware preset slots. This completely bypasses standard mobile audio filters and auto-gain compression, bridging your device directly to professional DC-coupled DAQ hardware and external instrumentation microphones. Crucially, this update adds a switchable Hardware DC Block. This filter dynamically eliminates false electrical offsets from external hardware before the data hits the FFT—instantly zeroing inflated baseline SPL readings while strictly preserving the engine's 0.2 Hz infrasound metrology. Your infrasound detector and acoustic toolkit scale seamlessly to your exact technical requirements, delivering pristine, unadulterated telemetry you can trust. Taking absolute control over your input variables guarantees your field readings match the accuracy of expensive lab bench equipment. Forensic-Grade Cryptographic Proof Every session concludes with an ISO 17025-calibrated, NIST-traceable PDF audit report secured by real-time SHA-256 cryptographic frame sealing. The architecture ensures that any attempt to alter the captured frequency analysis breaks the digital seal, guaranteeing the absolute integrity of your data. You walk away with fully certified, evidentiary-weight documentation that commands immediate authority in any investigative, industrial, defense, or scientific setting. Presenting lab-grade, cryptographically sealed proof provides total confidence and professional peace of mind.