Comm Systems - Comprehensive

All amplified voice systems consist basically of an amplifier, a microphone, and a loudspeaker. What converts the sound energy into electrical energy having the same waveform as the sound energy?

The most widely used microphones are the (1) magnetic, (2) dynamic, (3) crystal, and (4) which other types?

What is the common connection between a group of line cutout switches?

The dynamic microphone requires no external voltage source. It has good fidelity and produces an output volt age of about how many volts when spoken into in a normal tone within a few inches of the diaphragm?

Which publication contains the proper operating procedures for sound-powered handsets and headset-chestsets?

Jackboxes can be single-gang, double-gang, or which other type?

The crystal microphone utilizes a property of certain crystals, such as quartz, Rochelle salt, sugar, or coal, known as which effect?

Which term is defined as a quantity of telephone jackboxes connected by one or more lines, either directly or through switchboards and switchboxes, to provide a means of communication between personnel at various stations?

Which term is defined as the location of a jackbox where a sound-powered telephone operator mans a sound-powered telephone?

The crystal microphone can produce an output voltage of from 0.01 to 0.03 volt into a load of what or more, when subjected to a sound pressure of a normal tone within a few inches of the crystal?

What is the smallest portion of a circuit that can be electrically isolated by operation of switches at a central point?

Which type of microphone is not used in shipboard announcing equipment because it requires a polarizing current and has a tendency to amplify certain frequencies more than others?

Crystal microphones have impedances of several hundred thousand ohms, whereas the magnetic and dynamic microphones have impedances that range from 20 to how many ohms?

Which system provides the most reliable means of voice communication within a ship?

How many general rules should be followed by sound-powered-phone talkers?

Which type of line is a line between two switchboards, two switchboxes, or a switchboard and a switchbox?

Which term is defined as cross connecting two or more sound-powered circuits?

The automatic dial telephone system (which designated circuit) is used on board ship primarily as an administrative circuit?

What are the most common type of telephone sets installed aboard ship today?

How many versions of the type G telephone set are available for use in the automatic dial telephone system?

How many models of the type G (version 1) telephone set are there?

If you do not start dialing within how many seconds, the supervisory signal informs the switchboard to extend the howler tone (600 Hz at 8 impulses per second) to the telephone set?

The telephone set is a compact unit that transmits and receives speech, and signals the desired station. The telephone set is made up of how many components?

The basic non-restricted telephone set can be used in how many different configurations to accommodate all ships’ mounting requirements?

Which network is the control circuit for the telephone set?

Which contacts remain closed as long as the dial is rotating?

What automatically operates when the handset is removed from or replaced in the handset holder?

What is a device that converts electrical energy into sound energy and radiates this energy into the air in the form of waves?

Which mechanism changes electrical vibrations into mechanical vibrations that are transmitted to a diaphragm or other vibrating source?

Microphones are rated according to how many different characteristics?