CAO: Car Audio Ontology

CD Changer Capacity

The diameter of the speaker. Typical unit code(s): CMT for centimeters, INH for inches

The diagonal, usually measured in inches. The diagonal measurement of a display as the actual viewable area is also dependent on the aspect ratio of the display. For a display device of the same area, the diagonal achieves a larger value in a widescreen than compared to a more square screen. There is a risk of manufacturers making displays wider than what is actually most convenient in order to make the diagonal achieve a larger value.

Source: http://en.wikipedia.org/wiki/Display_size

Audio power is the electrical power transferred from an audio amplifier to a loudspeaker, measured in watts. The electrical power delivered to the loudspeaker, together with its sensitivity, determines the sound power level generated (with the rest being converted to heat).

Source: http://en.wikipedia.org/wiki/Audio_power

Connection possibilities of electronical devices.

Supported audio/video formats.

Defines features of a audio/video receiver.

An audio frequency (abbreviation: AF) or audible frequency is characterized as a periodic vibration whose frequency is audible to the average human. It is the property of sound that most determines pitch and is measured in hertz (Hz).

Source: http://en.wikipedia.org/wiki/Audio_frequency

The nominal impedance rating of consumer loudspeakers systems can aid in choosing the correct loudspeaker for a given amplifier (or vice versa). If a home hi-fi amplifier specifies 8 ohm or greater loads, care should be taken that loudspeakers with a lower impedance are not used, lest the amplifier be required to produce more current than it was designed to handle. Using a 4 ohm loudspeaker system on an amplifier specifying 8 ohms or greater could lead to amplifier failure.

Source: http://en.wikipedia.org/wiki/Electrical_characteristics_of_dynamic_loudspeakers#Nominal_impedance

The unit of measurement for a gr:QuantitativeValue, a gr:UnitPriceSpecification, or a gr:TypeAndQuantityNode given using the instance, i.e. Voltage - http://dbpedia.org/resource/Volt

Radio Data System, or RDS, is a communications protocol standard for embedding small amounts of digital information in conventional FM radio broadcasts. RDS standardises several types of information transmitted, including time, station identification and programme information.

Source: http://en.wikipedia.org/wiki/Radio_Data_System

A remote control is a component of an electronics device, most commonly a television set, DVD player and home theater systems originally used for operating the television device wirelessly from a short line-of-sight distance. Remote control has continually evolved and advanced over recent years to include Bluetooth connectivity, motion sensor enabled capabilities and voice control.

Source: http://en.wikipedia.org/wiki/Remote_control

Determines whether the panel of the device is removable.

Determines whether the receiver has iPod connection.

Material used for the speaker.

A touchscreen is an electronic visual display that can detect the presence and location of a touch within the display area. The term generally refers to touching the display of the device with a finger or hand. Touchscreens can also sense other passive objects, such as a stylus. Touchscreens are common in devices such as game consoles, all-in-one computers, tablet computers, and smartphones.

Source: http://en.wikipedia.org/wiki/Touchscreen