Type of force that exists between two electrically charged objects. Objects with a similar charge repel each other, and objects with dissimilar charges attract each other. No current flows in an electrostatic environment.
A system by which electrical energy is used to generate a field between a positive point and a negative point (also called the ground) by which flock can be charged and oriented by the field, and propelled from the positive point to the negative point.
1. When applied to a transducer, means that movement is converted to or from an electrical signal by electrostatic attraction or repulsion between two charged conductors. Opposite of dynamic. See Electrostatic Loudspeakers.
An electrostatic headphone is a headphone in which the traditional magnet and coil type dynamic transducers are replaced with an electrostatically driven transducer. The transducer uses a uniform electric field to attract and repel an extremely thin Mylar diaphragm to reproduce the virtually distortion-free sound.
Commonly referring to loudspeakers in which a thin conductive membrane serves as the diaphragm driven by electrostatic forces generated between it and fixed perforated electrodes in front of and behind it. Requires a polarizing voltage, and high voltages to drive it. Electrically capacitive. Usually radiating a dipole sound field. Small maximum displacements limit low frequency output and necessitate large diaphragms, and consequent directivity issues. See: Dipole, Directivity.
One of the oldest speaker design principles, electrostatic speakers are generally comprised of two fixed perforated panels with a constant high-voltage charge applied to them. In between these two panels is an extremely low-mass diaphragm to which the audio signal is applied, causing it to move. There are variations on this construction, but all electrostatic speakers are free from the magnets and voice coils used in conventional speakers.
When two objects in each other's vicinity have different electrical charges, an electrostatic field exists between them. An electrostatic field also forms around any single object that is electrically charged with respect to its environment. An object is negatively charged (-) if it has an excess of electrons relative to its surroundings. An object is positively charged (+) if it is deficient in electrons with respect to its surroundings.
The electrical force induced when friction is applied between two nonconductive materials (eg plastic and paper). The principle has been applied to loudspeaker design. The Electrostatic loudspeaker works by applying a fixed or polarizing voltage to an electrostatically charged flat diaphragm mounted between two transformer coupled plates fed anti-phase signal.
Describes a process in which something acquires an electrical charge and is as a result attracted to an article of opposite charge, or replaced by an object with the same charge. In coatings industries this property is usually used in the application of both powder and wet paints, and in ink jet printing. The coatings particles are electrically charged as they leave the gun/jet head and are attracted to the earthen substrate. As the coating thickness builds up on the substrate, its attractiveness to the coatings particles diminishes and, especially with powder a fairly even film thickness can be achieved.
A type of speaker that uses a pair of thin panels, rather than a conventional drive unit. Positive and negative electric charges are passed over the panels, one stationary and one moveable, to generate sound - two positive or two negative charges repel each other while a positive and negative attract each other, which leads to movement and so sound production. Characteristically, they tend to offer enhanced stereo imaging (largely due to the lack of room resonances generated by the design) but can require careful placement due to producing a tightly focused soundstage.