RTA Audio Spectrum Analyzer

RTA Audio Spectrum Analyzer transforms your device into a professional-grade acoustic measurement instrument. Whether you are a sound engineer tuning a venue, an acoustician measuring noise levels, or an audio enthusiast optimizing your home theater, this app delivers the precision and features you need.

PROFESSIONAL-GRADE ANALYSIS

Built with ANSI S1.11 and IEC 61260 Class 1 compliant filters, RTA provides measurement accuracy that meets international standards. Choose between full octave and 1/3 octave band analysis modes to match your specific measurement requirements.

REAL-TIME SPECTRUM VISUALIZATION

Watch audio frequencies come alive with smooth, responsive spectrum displays. Switch between classic bar graphs and continuous line plots. Enable peak hold and minimum tracking to capture transient events and identify the quietest moments in your measurements.

COMPREHENSIVE NOISE CURVE OVERLAYS

Compare your measurements against industry-standard noise criteria including NC (Noise Criteria), NCB (Balanced Noise Criteria), PNC (Preferred Noise Criteria), RC (Room Criteria), NR (Noise Rating), and X-Curve for cinema calibration. Essential for HVAC noise assessment, room acoustics evaluation, and venue certification.

FLEXIBLE DECAY AND AVERAGING

Select from multiple decay time constants including Fast (35ms), Medium (125ms), Slow (500ms), and Very Slow (1s) to match measurement standards or personal preference. Choose between real-time display, peak hold, and running average modes.

DEVICE CALIBRATION

Built-in calibration profiles for popular iOS devices ensure accurate measurements right out of the box. Import custom calibration files for external measurement microphones to achieve laboratory-grade precision.

SAVE AND EXPORT MEASUREMENTS

Capture snapshots of your measurements and custom notes. Export your data in multiple formats including CSV for spreadsheet analysis, JSON for software integration, and PDF for professional reports.

KEY FEATURES

Real-time octave and 1/3 octave band analysis

ANSI/IEC Class 1 compliant digital filters

Overall SPL with A-weighting

Peak and minimum level tracking with double-tap reset

Six noise curve overlay standards

Four selectable decay time constants

Three averaging modes

Bar and line visualization options

Built-in device calibration profiles

Custom calibration file import

GPS location tagging for measurements

Export to CSV, PDF, and JSON formats

Dark theme optimized for low-light environments

Portrait and landscape orientation support

No advertisements or subscriptions

IDEAL FOR

Live sound engineers and FOH technicians

Acoustic consultants and noise assessors

HVAC and building services engineers

Recording studio technicians

Home theater enthusiasts

Audio system installers

Musicians and audio hobbyists

Environmental noise monitoring

Educational demonstrations

MEASUREMENT ACCURACY

All octave and 1/3 octave band filters meet or exceed ANSI S1.11 and IEC 61260 Class 1 specifications for center frequency accuracy and filter bandwidth. The app uses optimized FFT algorithms for low-latency, high-resolution frequency analysis.

PRIVACY FOCUSED

RTA processes all audio locally on your device. No audio data is transmitted to external servers.

Download RTA Audio Spectrum Analyzer today and experience professional acoustic measurement in the palm of your hand.

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