Noisebuster PA4000 Electronic Noise Canceling Safety Earmuff

The most advanced electronic noise cancellation technology. A new innovation in safety protection, the NoiseBuster Electronic Noise Canceling Safety Earmuff combines superior passive hearing protection with the most advanced electronic noise cancellation technology. These industrial grade noise canceling headphones provide electronic hearing protection that allows you to hear speech more clearly while blocking unwanted noise. The Noisebuster Noise Canceling Earmuffs are a must-have product if you are operating farm equipment, lawn equipment, power tools or attending motor sports events.

The Noisebuster Noise Canceling Safety Earmuff also allow you to use any portable audio player such as an iPod while wearing them. The NoiseBuster ENC Earmuff is specifically designed for the industrial worker. The product delivers up to 20dB of electronic noise canceling and has a passive noise reduction rating of 26dB (over-the-head). Get the highest-performing hearing protector available -- at an unbelievably low price!

• Hearing protection: Experience noise reduction across the full range of frequencies
• Safety: Critical speech communications are heard more clearly
• Usability: Listen to music or radio communications at lower, less damaging volumes
• Wearability: Over-the-head style
• Durability: Tough earmuff and headband
• Accessories and Replacement Parts: Ear cushions, battery door assembly
• Comfort: Soft, pliable cushions and adjustable headband

• On/off switch and power indicator
• Stereo input 3.5 mm audio jack
• Up to 65 hours of use on a single AA battery
• Adjustable headband
• Resistant to water and moisture, contaminants, mechanical shock and vibration
• Warranty - 6 months

• ENC performance range: Between 20Hz and 800Hz
• ENC attenuation: 20dB between 100 - 200Hz, 0dB crossover at 20Hz and 800Hz
• Passive attenuation: NRR 26dB / CSA Class A (over-the-head)
• Storage temperature: -40C to +85C
• Operating temperature: 0C to +55C
• Audio cable length: 50cm (20 inches)
• Product weight: 17 oz (with battery installed)
• Power: one AA battery

A NoiseBuster ENC Earmuff uses a microphone inside the ear cup to listen to noise coming into the ear. Using electronics the system takes that information and uses it to create a noise wave that is directly opposite of, the one coming into the ear. The "anti-noise" wave is output through a speaker also located in the ear cup. When the two waves (the noise wave and the anti-noise wave) meet, the noise is significantly reduced.

ENC is the most effective defense against low frequency noise. Low frequency noise consists of powerful sound waves that can travel great distances and cannot be absorbed by conventional passive materials. Noises generated by engines, fans, motors and other similar devices are typically dominated by low frequencies--frequencies that cannot be stopped by passive earmuffs.

In addition to the detrimental effect it has on hearing, low-frequency noise creates another, perhaps even more serious effect. Because low-frequency noise masks speech, it is difficult for a person to hear and comprehend speech and warning signals when exposed to such noise.

The passive component of the NoiseBuster ENC Earmuff provides superior attenuation of mid- and high-frequency noise.

• NoiseBuster safety earmuff
• AA battery
• 3.5 mm audio interface cable jack