Speaker Frequency Response

Curious whether your speaker is bass-heavy, bright, or actually balanced? Speaker Frequency Response plays a sweep tone through your speaker or headphones and measures how it actually sounds using your phone's microphone — then shows you a relative frequency response curve. [ HOW IT WORKS ] ● Play a Sweep Tap Start Measurement and the app plays a tone that sweeps from 20Hz to 20kHz through your speaker or headphones. ● Listen and Analyze While the sweep plays, your phone's microphone captures the sound and analyzes it in real time using FFT (fast Fourier transform) — the same signal analysis audio engineers use. ● Read the Curve You get a relative response curve (0dB = your speaker's own average, not an absolute loudness standard) plus a plain-language verdict: bass-heavy, treble-heavy, mid-heavy, or balanced — along with where the low and high end start rolling off. ● Save and Compare Name and save measurements so you can compare speakers, headphones, or rooms side by side. [ FEATURES ] - Automatic microphone-based frequency sweep measurement - Relative response curve, 20Hz–20kHz - Plain-language balance verdict with rolloff points - Background noise and clipping warnings — know when to remeasure - Save and compare multiple measurements - Adjustable sweep duration - Light, dark, and system themes [ IMPORTANT NOTES ] This app measures relative frequency response, not absolute SPL or dB — your phone's microphone is not a calibrated measurement mic, so results are best used for comparing speakers or headphones to each other, not as lab-grade specs. It's built for external speakers and headphones; a phone's own built-in speaker is too close to the mic to measure meaningfully. Measure in a quiet room, about 30cm from the speaker, for the most reliable curve. Find out what your speaker actually sounds like.