FreqCheck™

At its core, FreqCheck™ operates as a fully calibrated, forensic-grade frequency measurement engine. Powered by proprietary IND CORE™ technology, the software places an ISO/IEC 17025:2017-calibrated, NIST-traceable measurement facility directly into a mobile iOS environment — performing real-time FFT spectral decomposition, Hanning-windowed signal segmentation, and dynamic root-mean-square amplitude normalization, entirely on-device.

In Standard Mode, the engine deploys adaptive noise cancellation and heuristic band classification optimized for low-frequency sweeps and continuous monitoring under everyday field conditions.

In Pro Input Mode (PIM), that heuristic layer steps aside entirely — standard mobile audio filters, automatic gain control, and digital noise gating are bypassed so the signal reaching the engine is completely raw, linear, and unattenuated, directly mirroring the voltage delivered by your connected sensors.

In Wideband Metrology Mode (WB), the engine unlocks the high-frequency acoustic and ultrasonic spectrum (30 Hz – 96 kHz) at selectable clock rates up to 192 kHz. Engineered for dual-domain metrology, Wideband Mode resolves rapid A-duration impulse events (air blast, muzzle report, firearm suppressor R&D) via microsecond peak-hold capture while delivering continuous ultrasonic spectral tracking for predictive maintenance, pressurized gas leak detection, and electrical corona discharge analysis without clipping or slew-rate saturation.

With the Dynamic Pulse Sequence (DPS), the engine automates peak-hold event counting, calculates A-duration thresholds, and generates compliant audit protocols for impulsive noise environments natively on the device.

By locking the internal DSP to external hardware clocks up to 192 kHz, the heavy, network-dependent DAQ benches that once defined this kind of work are no longer required to get a result that meets the same standard they did — and the exact metrological pipeline applied is now something you explicitly choose, not something the software silently decides for you.

YOU COMMAND THE HIGHEST GLOBAL BENCHMARK OF METROLOGICAL ACCURACY WITH TOTAL CONFIDENCE IN YOUR DATA.

THE FOUR-LAYER FORENSIC INTEGRITY ARCHITECTURE

When FreqCheck™ captures a measurement, it doesn't just record data — it produces a legally defensible, forensically tamper-evident, cryptographically sealed measurement artifact.

That means the result you export is built to hold up under exactly the kind of scrutiny it's likely to face: academic peer review, regulatory proceedings, engineering liability cases, defense qualification audits, and courts of law.

Your evidence doesn't just describe what happened. It proves it.

This is made possible by the Four-Layer Integrity Architecture:

Layer 1 — Metrology Configuration Snapshot
When a measurement is captured under Pro Input Mode, the exact hardware parameters in effect—sample rate lock (up to 192.0 kHz), ADC voltage ceiling (10V / 16.6V), sensor sensitivity coefficients, acoustic offset, hardware channel routing (Left/Right/Auto), and physical units (dB SPL, m/s², dBFS)—are recorded on a read-only configuration block and permanently stamped onto the report before any cryptographic sealing occurs. The conditions under which a measurement was taken are documented as rigorously as the measurement itself, leaving nothing to memory after the fact.

Your setup configuration is now as legally defensible as your captured telemetry.

Layer 2 — Device-Hash Anchoring
The measurement report permanently records the unique hardware signature of the specific iOS device that performed the measurement. That means the instrument and the data are cryptographically married — a report can't be quietly reassigned to a different device after the fact.

Layer 3 — SHA-256 Cryptographic Sealing
At the precise moment of report generation, every data point — every frequency value, amplitude measurement, timestamp, and configuration parameter — is mathematically sealed using SHA-256 cryptographic hashing, anchored to the specific device and session telemetry. That means the data cannot be altered without breaking the seal, and the break itself becomes visible evidence.

Layer 4 — Digitally Signed PDF Export & LIMS Integration
The final exported report is a professionally formatted, cryptographically signed PDF document. That means if any value, graph, timestamp, or configuration parameter is altered by even a single digit after generation, the forensic checksum immediately reveals the tampering. Traditional acoustic workflows end in exposed CSV files — FreqCheck replaces this vulnerability with an immutable forensic record, making every report a fully qualified, ready-to-deploy edge component for any enterprise Laboratory Information Management System (LIMS).

This is how FreqCheck™ turns a smartphone into a forensic instrument — the data it produces isn't just accurate, it's provably, demonstrably, cryptographically accurate.

Your data is provably, demonstrably, and cryptographically bulletproof.

ENTERPRISE & INDUSTRIAL APPLICATIONS

Because FreqCheck™ measures continuously across an expansive bandwidth from 0.2 Hz infrasonic baselines through 96 kHz wideband and ultrasonic spectra, its core applications span multiple heavy industries — the same certified engine, applied wherever acoustic and vibrational truth matters.

Execute accredited impulse noise and blast wave characterization for firearm suppressors, ordnance testing, and defense acquisition qualification. Powered by the Dynamic Pulse Sequence (DPS), FreqCheck automates peak-hold event counting and A-duration thresholds. Handshaking natively at 192 kHz sample rates with 10V and 16.6V analog front-ends, the engine eliminates slew-rate limitation to capture microsecond rise times and transient overpressures past 175 dB RMS without clipping. Sealed PDF telemetry protocol outputs natively satisfy MIL-STD-1474E, ASTM, ISO 10843, and ANSI S12.19 requirements directly on the firing line.

Microsecond transient overpressures are captured with uncompromising linearity and complete field mobility.

Perform continuous wideband spectral monitoring to identify early mechanical degradation, turbulent compressed gas leaks, and high-voltage electrical partial discharge across the ultrasonic spectrum. By operating at full 192 kHz resolution without analog roll-off, FreqCheck reveals high-frequency bearing friction, steam trap failures, and electrical switchgear corona ionization long before heat or audible noise appears.

PREDICTIVE ULTRASONIC SURVEILLANCE STOPS MACHINERY BREAKDOWN WEEKS BEFORE DOWNTIME OCCURS.

Measure the natural resonant frequencies of critical infrastructure and industrial machinery to detect shifts in vibrational signatures. That means developing problems in a bridge, a support structure, or a piece of heavy machinery can surface as a measurable frequency shift long before they surface as a failure.

Rapid, field-deployable health monitoring replaces waiting for something to visibly break.

Pair with certified hydrophones or DC-coupled seismic sensors to identify low-frequency acoustic events, tectonic shifts, and subsurface anomalies down to the 0.2 Hz range. That means signals normally reserved for fixed seismic stations become observable from a mobile, field-deployed device.

The deep, slow signals of the earth become as measurable as anything audible.

Analyze baseband signals from demodulated Part 90 radios via Pro Input Mode's DC-coupled inputs, down to 0.2 Hz, with the sample rate locked to match your radio equipment's exact output. This generates cryptographically sealed reports built specifically for frequency coordination evidence, with the receiving hardware's configuration documented directly on the report itself. That means the documentation submitted for licensing coordination carries the same tamper-evident integrity as every other FreqCheck report.

Regulatory evidence and day-to-day field measurement now come from the exact same certified source.