Sound source
A sound source is an object that superimposes an additional alternating pressure on the atmospheric pressure , the sound pressure , and in this way generates sound waves . In sound engineering , a musical sound source is a body of sound , such as an organ , a string quartet or a piano trio .
Every body that vibrates in a transmission medium is a sound source, even if the sound such as infrasound and ultrasound is not always perceptible to humans.
Primary sound sources such as musical instruments , singers , machines or natural noises can also be reproduced in other places and at other times using electronic means . Loudspeakers are usually used for playback as electro-acoustic transducers , which then also represent a sound source themselves.
Sound sources can be divided into useful sound sources (e.g. music) and interference sound sources in which the sound development is an unwanted side effect (e.g. jackhammer or road traffic ). Phantom sound sources are generated by two or more real sound sources, the signals of which have slight differences in transit time and thus give the impression that the sound sources are in a different location than is actually the case. Loudspeakers are usually used here as sound sources .
With a sufficiently high number of loudspeakers , a virtual sound source can also be generated ( Huygens principle ). The elementary waves physically synthesize the wave front emanating from the virtual sound source . Your apparent starting point does not, as with the phantom sound source, depend on the location of the listener and on psychoacoustic effects. Like a real sound source, it is always located at its apparent starting point. According to the principle of wave field synthesis , the acoustics of the recording room can be simulated with such virtual sound sources .