In our Audio ABC, we offer you easy-to-understand glossary articles on key terms and topics from the world of hi-fi - compact, informative and ideal for deepening your knowledge of sound, technology and devices.
D
DAB stands for "Digital Audio Broadcasting" and is a digital transmission standard for radio signals. DAB+ is a further development of DAB and offers better sound quality and a larger selection of radio stations. With DAB/DAB+, radio stations can be received without noise and interference, similar to digital television.
The digital-to-analog converter is an electronic device that converts digital signals into analog signals. It is often used to convert digital audio data into analog audio signals that can be reproduced by loudspeakers. DACs are integrated in many devices such as smartphones, computers and audio equipment.
A parameter that describes the ratio of the impedance of the loudspeaker to the output impedance of the amplifier. A high damping factor means that the amplifier can control the loudspeaker better, especially at low frequencies.
Decibel (dB) is a unit of measurement used to measure loudness or sound pressure level in audio. It is a logarithmic scale that represents the ratio between two sound levels. An increase of 10 dB is perceived as a doubling of the volume, while a decrease of 10 dB is perceived as a halving of the volume.
In the audio context, "digital" refers to the fact that the sound is represented in the form of discrete numerical values (ones and zeros) rather than as a continuous analog waveform. This enables precise and lossless reproduction of the audio signal. Digitization allows audio files to be easily edited, transferred and stored.
Speakers that emit sound both to the front and to the rear. However, the rear sound is phase-shifted, which creates a diffuse sound reproduction and ensures a wider sound stage.
Drive system for turntables. With a direct drive, the platter is driven directly by a motor, resulting in precise and stable playback. In contrast, belt drives use a belt to rotate the platter.
A loudspeaker that emits sound directly in a specific direction without scattering or reflecting it. This results in precise and focused sound reproduction. Direct emitters are often used in hi-fi systems and home theater systems.
"Digital Living Network Alliance", a standard that makes it possible to connect different devices in a network and share media content such as music, videos and photos. DLNA-compatible devices can communicate with each other via WiFi or Ethernet and stream content seamlessly without the need for additional cables or configurations. It is a practical solution for transferring media content from one device to another and playing it on different devices in the home network.
"Dolby encompasses a range of technologies that enhance sound and provide realistic surround sound experiences, from simple 5.1 systems (Dolby Digital) to immersive 3D sound (Dolby Atmos).
"Special arrangement of loudspeakers (or subwoofers) in audio systems. These are positioned in such a way that the sound is radiated downwards. This can lead to improved bass reproduction, as the sound uses the floor to spread out and creates a stronger perception of low frequencies.
"Electronic component used in loudspeaker systems. It consists of three separate amplifiers that are responsible for reproducing different frequency ranges: Low frequencies, mid frequencies and high frequencies. By splitting the frequencies into separate amplifiers, a three-way driver can provide a more precise and detailed sound reproduction.
"Digital signal processor". Refers to a special microprocessor that is optimized for processing digital signals. DSPs are often used in audio devices, cell phones and other electronic devices to analyze, modify or generate signals. They enable efficient and precise processing of signals in real time. DSPs also enable effects, equalizer adjustments and room corrections.