Dual Hydrophone PCB

Product Overview

The Dual Hydrophone PCB is a dual-channel high impedance buffer designed for hydrophone and piezoelectric transducer applications. It provides a simple and reliable interface between high-impedance piezo sensors and audio recording devices.

It is powered from a nine volt battery and is intended to be used with small 3.5mm input field recorders.

Designed for field recording, underwater audio capture, and other piezo-based sensing applications, this board enables clean signal buffering and straightforward integration with portable recorders.

Key Features

• Dual-channel high impedance buffer for piezoelectric transducers
• Optimized for hydrophone applications and underwater audio capture
• Battery powered (9V typical) for portable operation
• Low output impedance suitable for driving recording devices

Applications

• Hydrophone and underwater audio recording
• Piezoelectric transducer signal buffering
• Field recording and environmental monitoring
• Dual-channel sensor and measurement systems

Technical Description

The Dual Hydrophone PCB provides two channels of high impedance buffering, allowing piezoelectric transducers to operate without signal loss caused by loading. This is particularly important in hydrophone applications, where maintaining signal integrity is critical for capturing low-level acoustic information.

The buffered outputs are suitable for connection to portable recorders or other audio input devices, providing a stable and low-impedance signal. The board is typically powered from a 9V battery and can operate over a wider input voltage range.

• High Input Impedance
  Approximately 1MΩ input impedance preserves signal from piezoelectric transducers.
• Low Output Impedance
  Approximately 50Ω output impedance allows reliable interfacing with recording equipment.
• Wide Frequency Response
  Supports a broad frequency range suitable for acoustic sensing applications.
• Dual Independent Channels
  Enables stereo hydrophone setups or dual-sensor measurement systems.

Specifications

Helpful Pairings

This board is designed for use with piezoelectric hydrophone elements, such as our JLI-PZ001 Piezo Element, and can be connected to portable recording devices using standard audio inputs.

For phantom-powered operation or integration with professional audio equipment, see our P48 Hi-Z Piezo Buffer.

Frequently Asked Questions

What does this board do?
This board buffers signals from piezoelectric transducers, allowing them to be used with standard audio recording equipment without signal loss.

What is this used for?
It is commonly used in hydrophone builds and other piezo-based sensing applications where high input impedance is required.

What do I need to use this?
You will need one or two piezoelectric transducers, a suitable power source (typically 9V), and a recording device or measurement system.