1、 The core structure of the multifunctional digital listening and listening device consists of:

1. Host unit

CPU and noise reduction system: Adopting digital dynamic noise reduction technology, through a three-level noise reduction mode, it effectively filters out intermittent interference such as traffic noise, footsteps, and collisions, and improves the signal-to-noise ratio.

Memory and Storage: The built-in memory can record 250 sets of data (including sound pressure values, time, location, etc.), supporting data backtracking and report generation.

Power system: using 4 alkaline C-type batteries, continuous working time of more than 24 hours, low working voltage of 4.1V, suitable for environments ranging from -20 ℃ to+55 ℃.

2. Probe and pickup sensor

Power consuming microphone: protection level IP67, diameter 78mm x height 50mm (excluding signal line), suitable for valve, pipe fitting and other detection scenarios.

Optional accessories: Supports expansion modules such as valve plug pickups and three section soft soil plugs, enhancing adaptability to complex environments.

3. Multi functional digital listening and listening instrument display and operation interface

LCD screen: Real time display of level fluctuations, filter settings, minimum sound pressure value and other parameters, supporting backlight function to ensure day and night visibility.

Physical buttons: equipped with power switch, sensitivity switch, listening switch, etc., the operation is intuitive and convenient.

4. Interface and Connection

USB 1.1 interface: Quickly transfer stored data to a computer and support importing data analysis software.

Earphone jack: standard stereo sealed headphones (impedance 60 Ω), optional aviation grade high fidelity headphones to enhance listening clarity.

5. Protection and Portable Design

Dustproof and waterproof structure: The host has an IP52 protection level, and the probe has an IP67 rating, which can withstand light rain or splashing water environments.

Portable accessories: Standard aluminum carrying case and shoulder strap, optional ABS resin hard carrying case for easy on-site carrying.

2、 Summary of the structural advantages of a multifunctional digital listening and listening device

1. Modular design: The host, probe, and accessories can be flexibly combined to meet different scene requirements (such as underground pipeline and valve detection).

2. High protection level: The dust-proof and waterproof structure ensures stable operation of the equipment in harsh environments, reducing maintenance costs.

3. Humanized operation: The large-sized display screen, physical buttons, and backlight function simplify the operation process and improve on-site efficiency.

4. Data compatibility: The USB interface and standard software support fast data export, making it easy to integrate into existing management systems.