David Clark Behind-The-Head, Dual Ear Headset

The David Clark H3442 is a Behind-the-Head, Dual Ear Headset designed for use in high-noise environments, particularly suited for fire, rescue, and EMS operations. This headset is part of the David Clark Series 3400 and is engineered to provide clear communication while offering superior noise attenuation and comfort.

FEATURES
• Equipped with an M-7A electret microphone that effectively cancels out background noise, ensuring clear transmission
• Dual ear design provides isolated reception and exceptional speech intelligibility, with dynamic earphone elements for high-quality audio
• Advanced undercut gel ear seals cradle the ears for superior comfort, even during extended use
• Adjustable overhead support assembly for a custom fit, and a reversible headband spring assembly that allows the microphone boom to be positioned on either side
• Built with rugged materials, including carbon steel hardware with a black finish, to withstand harsh environments
• Microphone On/Off switch located on the ear cup for easy access and control

BENEFITS
• Ensures clear and reliable communication in high-noise environments, critical for safety and efficiency during emergency operations
• Designed for long-term wear with features that reduce pressure points and provide a secure, comfortable fit

SPECIFICATIONS
• Weight: 16.8 oz (476 g)
• Noise Reduction Rating (NRR): 23 dB
• Microphone: M-7A electret, noise-canceling
• Microphone Impedance: 150Ω nominal
• Microphone Sensitivity: 400 mV +/- 6 dB into 150Ω load @ 1 kHz for 114 dB SPL input
• Microphone Frequency Response: 300-3,500 Hz
• Microphone DC Supply Voltage: 8-16V, 470Ω, not polarity sensitive
• Earphone Impedance: 300Ω each, wired in series
• Earphone Sensitivity: 90 dB SPL re 1 mW @ 1 kHz
• Earphone Frequency Response: 200-5,500 Hz
• Comm Cord: 6 ft. extended coil cord with ¼” stereo plug