The surface microphone described here is a form of contact microphone based on an ordinary 35-mm piezo disc. You can glue the piezo disc using double-sided thick adhesive tape on a surface to catch ...

The humble piezo element is often used as little more than a buzzer in many projects. However, you can do more with them, as [Something Physical] demonstrates with their nifty piezo noise box. Chec… ...

Ever hear of a piezo-optomechanical circuit? We hadn’t either. Let’s break it down. Piezo implies some transducer that converts motion to and from energy. Opto implies light. Mechanical… ...

Wire together your own unique microphone that can reveal hidden sounds all around you. ... A 27mm brass piezo disc. Donald Bell/CNET. You'll want a handful of 27mm piezo discs.

IT is not absolutely necessary that the microphone should form part of the direct circuit. It works just as well if connected so that, when the carbons are not touching, the whole of the current ...

A common enhancement to this circuit replaces R2 with an inductor as shown in Figure 2. Figure 2 Substituting an inductor for R2 improves the piezo driver’s output and efficiency. Often the inductance ...

Vesper of Massachusetts is claiming high fidelity for a MEMs piezo microphone that picks up the vibration of the user’s voice through the skull. Inside is the mems, an amplifier and a power regulator.