Ultrasonic Analyzer

Ultrasonic Analyzer is a real-time spectrum, spectrogram, oscilloscope, and octave RTA analyzer for your iPhone or iPad. It provides a visual representation of ultrasounds using a sampling rate of up to 384kHz**. You can listen to transposed ultrasounds* and analyze them in real time. For sounds that are normally inaudible, a slowed-down playback option is also available.

Ultrasonic Analyzer can be used to analyze the calls of various animals (e.g., bats, dolphins), measure the frequency response of high-end audio equipment, or evaluate ultrasonic sensors. Additionally, it allows you to analyze short imported audio files within a spectrogram context.

Features

- Sampling rates: 44.1kHz, 48kHz, 96kHz, 192kHz, 200kHz, 250kHz, 384kHz**
- Real-time transposed ultrasound listening during recording*
- Spectrogram analyzer: Color and black & white modes
- Spectrum analyzer
- Oscilloscope (full FFT window size)
- Octave RTA analyzer: Bands – full, 1/3, 1/6, 1/12 (RMS values)
- Max/min Octave RTA values
- dBFS Meter
- Fast real-time response
- Adjustable spectrogram frequency resolution
- Configurable time interval between FFT computations, with values as low as 1ms or even lower
- Fast Fourier Transform (FFT)
- FFT window sizes: 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536
- Recording trigger: Automatically triggers based on specified frequency bands
- Zoom and pan capabilities for all charts
- Measurement tools available in all charts
- Playback analysis
- Transposition during playback
- Slow-down playback: Transpose octaves down for easier analysis
- Picture-in-Picture (PIP) mode: Allows simultaneous spectrogram analysis with a secondary chart (Octave RTA, Spectrum, or Oscilloscope)
- Audio input support: Built-in microphone, external microphone (via USB camera adapter or iPhone/iPad dock connector – Core Audio compliant devices)
- Sharing options: Share charts and audio recordings via email, social networks, or clipboard
- Exporting capabilities: Save audio recordings (WAV) and image charts (PNG) to iOS Document Browser
- Audio file import: Load short audio files from other apps or the iOS Document Browser
- Supported audio formats: WAV, CAF, AAC, MP3
- Automatic sample rate conversion for imported files
- Frequency scale options: Linear and logarithmic
- Amplitude scale options: Linear and logarithmic (dBFS)
- dBFS Meter weighting: dBZ (linear)
- Adjustable spectrogram length (dependent on resolution settings)

Tested with (via USB adapter):

- Dodotronic Ultramic200K, Ultramic250K, Ultramic384K
- Pettersson M500-384
- Avisoft UltraSoundGate 116Un

Make sure you are using the latest iOS update.

*Requires an external microphone with ultrasonic capabilities connected via a USB adapter.
**Real-time analysis at a 96kHz sample rate or higher is only possible with an external USB microphone. Alternatively, you can import files recorded on an external device for non-real-tim