Ultrasonic & Infrasound
Hearing age test, mosquito frequency test, animal hearing range simulator (dog, cat, bat, dolphin, elephant), ultrasonic leak detector, infrasound monitor, ultrasonic tone generator, infrasound generator, ultrasonic spectrum analyzer, ultrasonic cleaning frequency calculator, bat frequency detector, seismic infrasound viewer, parametric speaker calculator, and human hearing boundary mapper — for pet owners, students, audiophiles, industrial technicians, acoustic researchers, and anyone curious about sounds beyond human hearing.
Available Tools
Ultrasonic Leak Detector
Detect compressed air, gas, and vacuum leaks by capturing high-frequency hiss through your microphone. Real-time spectrum display focused on the 15–22 kHz leak signature band, leak/no-leak confidence indicator, dB level meter for severity estimation, frequency band filtering to isolate leak hiss from background noise, and a scanning mode with audio feedback. Includes a reference guide to leak frequency signatures for air, nitrogen, and refrigerant systems.
Launch tool →Infrasound Monitor
Monitor and measure sub-20 Hz infrasound frequencies from environmental, industrial, and atmospheric sources in real time. Displays infrasound spectrum and time-domain waveform for long-period signals, includes a source identification guide (traffic, wind turbines, HVAC systems, geological activity), logs peak frequency and amplitude, and provides a health impact reference chart for infrasound exposure levels. Notes microphone low-frequency rolloff limitations.
Launch tool →Animal Hearing Range Simulator
Explore and compare the hearing frequency ranges of 30+ animals — dogs, cats, bats, dolphins, elephants, mice, owls, horses, and more — on an interactive visual chart alongside human hearing. Enter any frequency and instantly see which animals can hear it. Play test tones with a human audibility indicator, read fun facts per species (dogs hear 4× farther, elephants detect infrasound through their feet), and search the full animal hearing database.
Launch tool →Bat Frequency Detector
Detect and visualize bat echolocation calls on a high-frequency spectrogram display (20–120 kHz, hardware dependent). Includes a heterodyne mode that shifts ultrasonic calls into the audible range so you can listen, a species identification guide matching call frequency and pattern to common bat species, and recording/playback for field analysis. Transparent about browser microphone sample rate limits, with a hardware guide recommending USB ultrasonic microphones that work.
Launch tool →Mosquito Frequency Test
Test whether you can hear the “mosquito frequency” — the 17.4 kHz tone that teenagers hear but most adults over 25 cannot. Plays precise tones from 8 kHz to 20 kHz in steps, gives a clear pass/fail at the mosquito frequency, shows an age-based expected cutoff chart (typical high-frequency hearing loss by decade), includes a volume calibration step to ensure valid results, compares with common mosquito deterrent device frequencies, and generates a shareable result card.
Launch tool →Ultrasonic Cleaning Frequency Calculator
Find the optimal ultrasonic cleaning frequency for your application. Select your material and contamination type to get a frequency recommendation, compare 25 kHz vs 40 kHz vs 80 kHz vs 120 kHz with cavitation bubble size explanations (lower frequency = more aggressive cleaning), check material safety (which items risk damage at which frequencies), get power and wattage guidance per tank size, and look up “Can my 40 kHz cleaner handle this?” in the FAQ database.
Launch tool →Seismic Infrasound Viewer
Explore infrasound signatures from geological and atmospheric events. Reference chart showing typical frequency ranges for earthquakes, volcanic eruptions, meteors, thunder, avalanches, and ocean microbaroms. Captures real-time sub-20 Hz microphone data on a waterfall spectrogram for long-term monitoring, classifies event types by frequency pattern, correlates with atmospheric pressure changes, and explains how global infrasound detection networks (CTBTO) monitor nuclear tests and volcanic events.
Launch tool →Hearing Age Test
Find out how old your ears are. An automated test plays descending tones from 20 kHz downward — press a button when you stop hearing, and get an estimated hearing age based on your high-frequency cutoff. Includes age-normative reference data (average cutoff for each decade from 20s to 60s+), a volume calibration step to ensure accuracy, hearing protection tips, and a shareable result card (“My hearing age is X”). Not a clinical audiogram — for educational and entertainment purposes.
Launch tool →Ultrasonic Tone Generator
Generate precise high-frequency tones from 15 kHz to 22 kHz (browser audio limit) with a frequency slider or direct input. Choose sine or square waveforms, adjust volume with a safety warning for high-frequency exposure, check whether your speakers or headphones can actually reproduce the selected frequency, and confirm “Can you hear this?” at each step. Use cases include tweeter and speaker testing, pest deterrent frequency experiments, equipment calibration, and hearing limit exploration.
Launch tool →Infrasound Generator
Generate frequencies from 1 Hz to 20 Hz for subwoofer testing, acoustic research, and tactile bass experiments. Includes a speaker capability warning (most speakers cannot reproduce sub-20 Hz tones), subwoofer test mode with gentle volume ramping, a tactile bass perception guide explaining that infrasound is felt through the body rather than heard, a slow-oscillation waveform display so you can see the signal, and a safety warning for high-amplitude infrasound exposure.
Launch tool →Ultrasonic Spectrum Analyzer
Analyze the frequency spectrum above 15 kHz to detect and identify ultrasonic sources in your environment. Real-time FFT display focused on the 15–22 kHz range with automatic peak detection and Hz labels, source identification guide (switching power supplies, CRT monitors, ultrasonic leak hiss, animal calls), snapshot and recording export, sensitivity adjustment, and a clear explanation of browser sample rate limitations (44.1/48 kHz → Nyquist limit at ~22 kHz).
Launch tool →Parametric Speaker Frequency Calculator
Calculate carrier and modulation frequencies for parametric (directional) speaker systems that use ultrasonic beams to deliver focused audio. Compute carrier frequency (typically ~40 kHz), AM and DSB-SC modulation parameters, estimate beam width from transducer array size and frequency, visualize the directivity pattern, and reference component lists for DIY builds. Includes an applications guide covering museum audio spotlights, directional advertising, and personal sound zones.
Launch tool →Human Hearing Boundary Mapper
Map your personal hearing boundaries at both extremes with precision. Low boundary test ascends from 10 Hz — mark where you first start hearing. High boundary test descends from 20 kHz — mark where you stop hearing. View your combined personal hearing map overlaid on the textbook 20 Hz–20 kHz range, compare left ear vs right ear, see how your limits stack up against age-normative data, and optionally test loudness thresholds at multiple frequencies for a basic audiogram approximation. Save results and track changes over time.
Launch tool →