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.
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The number of samples per second that are recorded when an audio signal is digitized. It is specified in Hertz (Hz) and determines the audio quality. Typical sampling rates are 44.1 kHz (CD quality) or 96 kHz (Hi-Res audio).
Mechanical vibrations between 16 Hz and 20 kHz, which propagate as a wave and are perceived by our ears as sound.
A measure of the loudness of a sound signal. It is measured in decibels (dB) and indicates how strong the sound pressure is compared to a reference value. A higher sound pressure level means a louder reproduction of the audio signal.
Generation and emission of sound waves by a sound source, such as a loudspeaker. It describes the ability of a device to generate sound and make it audible. The sound emission is often evaluated in relation to the sound quality and volume of an audio device.
Process of converting electrical signals into sound waves and vice versa. This is done with the help of loudspeakers, which convert electrical energy into sound energy, and microphones, which convert sound waves into electrical signals. This sound conversion enables the playback and recording of audio in various devices such as loudspeakers, headphones and recording devices.
A flexible membrane that connects the edge of a loudspeaker to the voice coil. It allows the cone to move and also serves as a seal. The surround influences the sound quality and frequency response of the speaker.
Electrical or digital transmission of audio information, either in analog or digital form.
A signal processor processes audio signals to optimize or modify them and is used in many audio devices and applications to control sound quality and effects.
Spatial arrangement of sound sources in a stereo or surround system that gives the listener the feeling that the sound is coming from different directions.
"Sony/Philips Digital Interface" is an interface for the electrical or optical transmission of audio signals. It is often used to transfer digital audio data between different devices such as CD players, DVD players and amplifiers. SPDIF enables lossless transmission of high-quality digital audio via optical or coaxial cables.
Spotify is a popular music streaming service that allows users to listen to millions of songs and podcasts online, create playlists and stream content on different devices.
Function that makes it possible to play music from the Spotify app on different devices. The output device itself accesses the server via WiFi . A smartphone, for example, then "only" serves as a remote control, but is not connected to the playback device itself. The advantages include better sound quality and a more stable connection.
The reproduction of sounds via two separate channels to create a spatial sound image. Different audio signals are distributed to the left and right speakers to create a wider sound stage. This enables a more realistic and immersive listening experience.
Arrangement of loudspeakers and listening position in a triangle to create a spatial sound image. The speakers are placed in front of the listener in an isosceles triangle. This arrangement enables a realistic reproduction of music and sound effects.
An amplifier that amplifies two channels (left and right) to reproduce stereo sound.
Transmission of music or other audio content via the Internet in real time. The data is played continuously without having to be downloaded first. Users can access a wide range of music tracks and albums and stream them directly via their devices without having to physically own them.
Speaker specially developed for the reproduction of low frequencies. It amplifies and reproduces the bass components in music or sound design. Subwoofers are often used in home theater systems, car audio systems and professional audio systems to produce powerful and precise bass.
The ideal listening area where the sound is at its best. It is the point at which the speaker position and the listening position are optimally matched to achieve a balanced sound reproduction. Away from the sweet spot, the sound can lose clarity and precision.