Executive HD

The new Executive HD Wireless Microphone System provides the sound fidelity of wired microphones with the added appeal of a versatile wireless set-up. CD quality 50Hz-20kHz frequency response is a key reason for the improved audio performance. With an optimized speech codec, the new rack mountable Revolabs system handles live sound, voice reinforcement and wideband video- or audio- conferencing applications superbly.

The introduction of the Executive HD System is the latest example of Revolabs drive to deliver state-of-the-art wireless audio products. The audio quality of the HD Wireless Microphones is on par with wired microphones and they are ideal for almost any application.

The Executive HD Wireless System is available in 4 and 8 channel models. In the US, four Executive HD Systems can be linked together to support up to 32 HD Wireless Microphones in High Definition Mode. Five Executive HD Systems can be linked together to support up to 40 microphones in Maximum Density Mode, albeit without two-way audio. The HD System also has a reduced power mode which allows more Executive HD Systems to be used in a given area.

All Revolabs wireless microphones use 128-bit encryption, so no one can listen in. Rechargeable battery that provides up to eight hours of talk time after each full charge. The Executive HD Systems can use any combination of the HD Wireless Microphones.

All Revolabs HD Wireless Microphones include the RF Armor™ technology which enables the microphone to operate cleanly even when in direct contact with all wireless electronic devices known to cause unwanted audio interference, such as GSM mobile phones, smart phones, etc.

Source: http://www.revolabs.com/

Video Conferencing

Want a wireless microphone system that plugs directly into the video-conferencing station? Revolabs offers two options that plug directly into video-conferencing stations and give the meeting participants flexibility to move around the room and still be heard! The choice depends on how many wireless microphones you need.

One or two wireless microphones: The Revolabs HD Single Channel System has an analog input and output, and the Revolabs HD Dual Channel System has two of each, plus the ability to mix both outputs into one. The outputs can be set to line level for video-conferencing. All HD Wireless Microphones work with the HD Single and Dual Channel Systems and can be mix and matched, so you have your choice of wearable, tabletop, handheld or Countryman Earset microphones. The Revolabs HD Wireless Microphones can be placed up to 65 feet (20 meters) away from the Revolabs HD Single/Dual Channel System. For detailed instructions on how to configure specific video-conferencing equipment for Revolabs Wireless Microphone Systems, refer to the Technical Documents page.

Four or eight wireless microphones: Revolabs Fusion Wireless Microphone Solution includes all of the necessary cables to plug into any of the major video-conferencing solutions, including Lifesize, Polycom, Sony and Tandberg. It includes a remote control to control the sound volume in your conference room or in the conference room at the far end. Decide on where you want to put the Revolabs Fusion System, whether you want to place it vertically or horizontally, plug in the cables and you are ready to have great wireless audio on your video-conference! The Revolabs Fusion System provides four or eight wireless microphones. The Revolabs Wireless Microphones can be placed up to 65 feet (20 meters) away from the Revolabs Fusion Wireless Microphone System. For detailed instructions on how to configure specific video-conferencing equipment for Revolabs Wireless Microphone Systems.

Source: http://www.revolabs.com/

SPL - What's this mean for my hearing?

Sounds less than 75 dB have no significant effect on our hearing.

Exposure to sounds above 85 dB causes short term hearing losses called temporary threshold shifts. If this occurs, your ear becomes less sensitive, and sounds seem quieter than normal. After some time, normal hearing returns.

Repeated exposure to sounds that cause temporary threshold shifts results in permanent damage to the ear in the form of a permanent threshold shift . The ear loses sensitivity in the frequencies 3,000 Hz through 6,000 Hz, resulting in a "notch" in the hearing range. Time of exposure is important, the louder the sound, the less exposure time before permanent damage sets in.

According to OSHA, the exposure time limits are: (these are A-weighted, most home theater measurements are made with C weighting, which typically gives higer readings for broad spectrum measurements).

If you like to crank it on up during the "good parts" to really feel the action. Look at your results from the Peak SPL Calculator compared with the OSHA guidelines. Most moderate HT systems are capable of 102 to 107 dB peaks at a decent (10+ feet) listening position, at these peak levels the normal dialog is going to be at least 85-90dB, within the range where permanent hearing loss can occur.