FreqCheck : See Sound

From 0.2 Hz infrasound detection to 384Hz Wideband acoustics. FreqCheck is the Class 1 Mobile Lab App with ISO/IEC 17025-calibrated, NIST-traceable data. No bench needed.

• ISO 17025-calibrated spectral engine
• 0.2 Hz–192 kHz range, 384 kHz sampling
• Native Hardware DC Block
• Forensic-sealed, tamper-proof reports
• 100% offline, zero-knowledge privacy

FreqCheck is the first Class 1 Mobile Lab App — an ISO/IEC 17025-calibrated, NIST-traceable spectral engine powered by IND CORE™ (U.S. Patent No. 12,659,418, Patent Pending 19/660,467) that adapts to your expertise.

From 0.2 Hz infrasound to 192 kHz tactical WideBand acoustics — with up to raw 384.0 kHz hardware sampling. FreqCheck turns your iOS device into an enterprise-grade measurement lab.

That low hum no one else notices. That "therapeutic" tone track. That transient event you can't explain. FreqCheck lets you measure and prove it.

ENTERPRISE METROLOGY, ONE APP Everyday scanning, raw Pro Input Mode (PIM), Tactical WideBand Metrology, and Dynamic Pulse Sequence (DPS) — all in one certified engine. DC-coupled Line-In connects to pro DAQ hardware and instrumentation mics with zero attenuation, scaling from internal mic to raw 384.0 kHz captures.

PRO INPUT MODE (PIM) Manual control over channel selection, sample rate locks, ADC voltage ceilings, and sensor sensitivity (mV/Pa) — bypassing auto-gain and filters. Includes a switchable Hardware DC Block to natively eliminate electrical offsets from external DC-coupled DAQs while strictly preserving 0.2 Hz infrasound. Dual preset slots save custom hardware profiles for repeatable field precision.

TACTICAL WIDEBAND METROLOGY High-frequency acoustic analysis up to 192.0 kHz (384.0 kHz sampling). A dynamic 65,536-point FFT architecture powers enterprise-grade spectral resolution at extreme 384.0 kHz hardware clock speeds. Includes SPL readouts, live tracking, Peak Hold (Max SPL), and uncompressed spectral telemetry.

DYNAMIC PULSE SEQUENCE (DPS) Impulse metrology per MIL-STD-1474E, ANSI S12.19, ISO 10843/1996, and SAE J211. Isolates and logs extreme peaks via multi-shot logarithmic averaging. Configurable pulse counts (3–10), threshold gates, and anti-echo lockout windows (0.5–3.0s) deliver exact Peak SPL readings for tactical, industrial, and suppressor certification (ASTM) use.

OFFLINE MEDIA AUDITING Ingest raw video and lossless audio (.wav, .flac, .alac, .aiff, .m4a, .mp3) for offline calibrated analysis — audit media claims, verify sound therapy tracks, run forensic signal analysis.

FORENSIC-GRADE PROOF Four-layer security: device-hash anchoring, real-time SHA-256 sealing, session hashing, and signed PDF Audit Reports. Any tampering breaks the seal. ISO 17025:2017 Calibrated (Cert #05122C9A 2602).

ZERO-KNOWLEDGE PRIVACY 100% local, on-device processing via edge computing. No raw audio/video is ever uploaded or stored.

Starter: Free, ad-supported. Remove Ads: $2.99 one-time. *Pro Monthly: $19.99/mo, 7-day free trial. *Pro Lifetime: $149.99 one-time. *Pro unlocks the LOGS vault, full PDF Audit Reports, and posting/commenting in the Nyquist Forum — a repository for sealed telemetry data shared by field teams and investigators.

THE MICROSCOPE MOMENT The microscope didn't create bacteria — it revealed what was already there. GPS didn't create your location — it made it knowable. FreqCheck makes the full spectrum visible, measurable, and provable.

You don't need a degree. You need one tap.

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DISCLAIMER: Metrology tool for research, acoustic consulting, and educational use only. Not for medical diagnosis. Full NIST traceability requires unbroken calibrated external hardware.

LICENSE: Valid for technical verification & media analysis. Void for commercial manufacturer certification or packaging claims. © 2025-2026 Abundance Sea, LLC. All Rights Reserved.