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Live Sound Analysis

Bio-Acoustic Hunting Call Checker

Use your iPhone as a field assistant to help estimate whether a heard sound is likely a real animal call or a human / device imitation based on its acoustic characteristics.

Real-time Analysis Elk · Deer · Turkey Spectrogram View Offline Friendly

Quick Start

Follow these steps in the field or while reviewing recordings.

  1. 1
    Choose the target animal
    On the home screen, pick Elk, Deer, or Turkey. The app automatically loads the correct acoustic model and score weights for that species.
  2. 2
    Let the phone “listen”
    Hold the iPhone with the microphone pointed toward the sound source. The app continuously fills a 5-second buffer with audio from the built-in mic while you wait for a call.
  3. 3
    Tap Analyze
    After the call finishes, tap the Analyze button. The app runs a set of bio-acoustic checks (pitch stability, harmonics, band energy, noise, envelope shape, etc.) and computes a 0–1 score for “likely real”.
  4. 4
    Read the score & spectrogram
    The score widget changes color from red (very synthetic) to green (very natural), and the spectrogram shows the frequency structure of the call over time.
  5. 5
    Adjust sensitivity (optional)
    In Settings, you can tweak how strict the app is. If you want to flag more “maybe real” calls, reduce strictness. If you only want very clean, natural calls to score high, increase strictness.
Availability
The Hunting Call Checker app is designed for iPhone.
iOS • iPhone Optimized for outdoor use

App Store link: coming soon

Video Guides

Watch short tutorials on how to use the app, interpret scores, and understand the bio-acoustic features.

  • 1. App Overview & Setup
    Install the app, choose species, and learn what the score means.
    Watch on YouTube
  • 2. Field Examples
    Real recordings of elk, deer, and turkey calls with side-by-side human imitations.
    Watch on YouTube
  • 3. Acoustic Deep-Dive
    How the app uses pitch, harmonics, noise and timing to score calls.
    Watch on YouTube

Example App Screens

These screenshots show the main views of the Hunting Call Checker app. Replace the placeholders with real PNGs from your Xcode builds.

Hunting Call Checker home screen
Home / Species Selection

Choose which animal you’re listening for and see main status indicators.

Elk and Moose Deer Turkey Preditors
Hunting Call Checker home screen
Spectrogram View

View a log-frequency spectrogram of the last few seconds of audio and see where the call energy lives.

Log-freq axis Time vs pitch
Hunting Call Checker home screen
Score & Features

See the 0–1 score, color-coded confidence, and key feature metrics (HNR, band energies, envelope, etc.).

Score 0–1 Red → Green
Hunting Call Checker2 home screen
Score & Features

See the in-depth feature outputs of the microphone's input.

Hunting Call Checker3 home screen
Score & Features

Use the settings to change important parameters. Press the playback button to hear the captured sound again.