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| Photo Credit: Ohmz.net |
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| Photo Credit: dirknoy.di.funpic.de |
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Photo Credit: strugglingmuso.files.wordpress
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October 19, 2012
Comics for the Comms Geeks
October 18, 2012
What's the Difference?
For those that are new to the world of intercom, here are some terms you don't want to confuse with each other:
Analog vs. Digital
Clear-Com Handset Clear-Com Headsets
A handset is a telephone-style connection to an intercom station with an earpiece and microphone. A headset has one or two earphones with an integrated microphone on a boom arm and connects to a beltpack.
Analog vs. Digital
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| Encore Analog Partyline |
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| HelixNet Digital Partyline |
Analog systems
record waveforms as they are. Digital systems will convert the analog waveforms
into sets of numbers and record the numbers instead. When played back, the
numbers are converted into a voltage stream that approximates the original
analog wave.
Two-wire vs. Four-wire
Four-wire communication systems have a talk and listen
path that are separate. The term four-wire comes from the fact that the system uses
a transmit pair and a receive pair for the audio to and from the intercom (two
paths). They can be interfaced to
other four-wire audio devices and most
wireless intercom systems.
Two-wire communication systems have a path
is the same for both talk and listen. There are two wires (one path) for the transmit and receive.
They can
be interfaced to only some wireless intercom
systems.
Handset vs. Headset
A handset is a telephone-style connection to an intercom station with an earpiece and microphone. A headset has one or two earphones with an integrated microphone on a boom arm and connects to a beltpack.
October 16, 2012
How Do Divers Communicate?
1. Scuba divers can use hand signals to communicate.
2. They can also use underwater writing slates.
3. They can use wireless and hard wired communication systems as well. A transducer on the diver's face mask will converts his or her voice into an ultrasound signal. The other diver will have an ultrasound receiver that receives that signal and changes it back to a sound that the diver can understand.
The divers’ helmets, which have built in microphones and speakers, can be also linked to intercom stations, such as Clear-Com, on board the ship though an umbilical, enabling them to correspond with the Dive Supervisor and the crew on the deck.
Read the full case study here: World Class Vessel Maximizes Well Intervention Collaboration
2. They can also use underwater writing slates.
3. They can use wireless and hard wired communication systems as well. A transducer on the diver's face mask will converts his or her voice into an ultrasound signal. The other diver will have an ultrasound receiver that receives that signal and changes it back to a sound that the diver can understand.
The divers’ helmets, which have built in microphones and speakers, can be also linked to intercom stations, such as Clear-Com, on board the ship though an umbilical, enabling them to correspond with the Dive Supervisor and the crew on the deck.
Read the full case study here: World Class Vessel Maximizes Well Intervention Collaboration
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