This handheld audio vibration amplifier is designed for a wide range of testing tasks that require detecting and amplifying sound vibrations through solid surfaces. It converts surfaceborne vibrations into audible signals, making it easier to evaluate sound transmission and locate sources of noise. Key benefits Versatile testing tool suitable for many applications where detecting audio vibrations through solid surfaces is required. Compatible with common building materials including wooden walls, doors, windows, and steel plates. sensitivity picks up subtle vibrations and faint audio bands produced by human speech or machinery. Built from fine quality materials for reliable performance and long service life and delivers accurate testing results. Easy to integrate into existing testing routines and audio setups. How it works The device amplifies vibrations that travel through surfaces. Voices and other sounds create vibration bands that propagate different distances depending on volume. Those vibrations are captured by the device and converted into audible output. Performance and handling Very sensitive pickup requires careful, gradual adjustment of output volume to avoid discomfort to your earbuds. Designed for repeatable and consistent detection across a range of surface types and conditions. Practical use scenarios Acoustic and soundproofing checks in homes and offices to locate sound leakage through walls, doors, and windows. Maintenance and troubleshooting to identify vibration sources on metal panels and machinery surfaces. Onsite inspections where quick assessment of sound transmission through building elements is needed. Usage tip Start with low output and increase volume slowly while monitoring headphone comfort. Place the sensor firmly against the tested surface for results.