| Sensation Target | Frequency Range | Waveform Type | Notes | | :--- | :--- | :--- | :--- | | | 5–15 Hz | Triangle | Very low intensity; feel the edges of the electrode. | | Thumping / Hammering | 18–25 Hz | Square | The classic "fuck machine" feel. | | Buzzing / Pleasure | 40–80 Hz | Sine | The safe zone for beginners. | | Deep Vibration | 90–120 Hz | Modified Sine | Penetrates tissue; feels like a vibrating wand. | | Stinging / Sharp | 200–400 Hz | Square/Pulse | Advanced only. Can cause muscle twitching. |
When played through a standard speaker, an estim audio file often sounds like a rhythmic series of clicks, hums, or static noise. However, when connected to a stereo-to-electrode interface (a device that converts audio signals into safe electrical currents), those sounds translate into physical sensations—tingling, throbbing, contracting, or tapping—on the user’s skin. estim audio generator
Mid Frequencies (50Hz - 200Hz): This is the "sweet spot" for most. It creates a buzzing or vibrating sensation that can be very intense. | Sensation Target | Frequency Range | Waveform
Key: The audio signal must be and current-limited for safety. | | Deep Vibration | 90–120 Hz |
Think of it this way: A standard TENS unit is a cassette player—it has fixed tracks you cannot change. An is a full recording studio. You can synthesize sine waves, layer white noise, import binaural beats, or even sync stimulation to the rhythm of a favorite song.