Acoustic Response Calibration • 20 Hz
Music, movies, and games all depend on one thing to make them feel real: sound. Your computer or phone uses tiny parts called speakers to turn electrical signals into physical waves that travel through the air to your ears. But sometimes, these speakers can get damaged or simply aren't very good at making certain sounds. At Hardware Tester, our Speaker Audit tool helps you find out exactly what your speakers are capable of.
Our tool is like a tuning fork for your digital devices. We use something called Pure Sine Wave Synthesis to create clean, simple sounds that help you hear if your speakers are rattling, buzzing, or if they are missing certain types of sounds. It's a fun and easy way for anyone—from a 10-year-old student to a professional sound engineer—to check their hardware.
Sound is made of vibrations. Frequency is how fast those vibrations happen. Low vibrations (slow) sound like a deep "thump" or a growl. High vibrations (fast) sound like a whistle or a bird chirping. A Frequency Sweep is when we start at the very bottom (20Hz) and go all the way to the top (20,000Hz). This helps you find "weak spots" where your speaker might stop making sound or start making a weird rattling noise.
Inside every speaker is a wire that moves back and forth. If that wire gets slightly bent, it might rub against the speaker's magnet. This is called Voice Coil Rub. It makes a scratchy or buzzing sound, especially when you play certain deep notes. Our Hardware Tester helps you isolate these specific frequencies so you can tell if your speaker just needs to be cleaned or if it's actually broken.
Update: Feb 2026 (v3.5.15)
Added support for 32-bit floating point audio engines. Improved the "Oscilloscope" visualizer to show the raw waveform in high-definition. New "Sub-Bass" preset specifically for testing external subwoofers.
Update: Nov 2025 (v3.0.0)
Introduced "Pure Tone Generation." This ensures that the sound you hear is 100% clean, with no digital artifacts. Added safety limits to prevent accidental maximum volume on mobile devices.
Find Hidden Distortion
Sometimes speakers sound fine for voices but bad for music. Our sweep helps you find exactly which note makes your speakers buzz.
Test Bass Performance
Want to see if your headphones can handle deep bass? Use the 60Hz preset and feel the vibrations! If you hear a "clack," the bass is too much for your hardware.
Verify Stereo Balance
Use our tool to make sure both your left and right speakers are reaching the same volume at high frequencies. It's common for one side to be slightly quieter.
Follow these safety-first steps to test your audio:
Health Warning: Constant high-frequency sounds can be tiring for your ears. Only play sounds above 15,000Hz for a few seconds at a time.
Acoustic Calibration Protocol ACP-2026 • clinical Standard ISO-9001
Why can't I hear anything above 17kHz?
This is normal! As people get older, their ears gradually lose the ability to hear very high frequencies. Many kids can hear up to 20,000Hz, while adults might only hear up to 15,000Hz.
Why does my speaker rattle at low frequencies?
This usually means something is loose. It could be a screw inside your laptop or even just a pen lying near your phone. Clean the area and try again!
Is it safe for my pets?
Cats and dogs have very sensitive ears. Be careful not to play very high frequencies at high volume when your pets are nearby, as it can be uncomfortable for them.