Process and device for converting a periodic LF electric voltage into sound waves
OwnerHenri B. Bondarinventor
Life of this patent
Estimating the term…
Abstract
A process and a device for converting a periodic LF voltage into sound waves, or vice versa. The electro-acoustic transducer device has two groups of substantially parallel points which are separated by insulating screens. The points of each group are respectively connected to the positive terminal and to the negative terminal of a source of DC voltage, of the order of 10,000 volts, which renders the points emitters of an ion plasma. The DC voltage is modulated by a periodic LF voltage. The ion plasma oscillates and creates sound waves which analogically reproduce the LF voltage. This technology is particularly applicable to the construction of loud-speakers.
Claims13
Electro-acoustic transducer device comprising:
- (a) a first assembly of elements with each having a sharp end;
- (b) means for taking said first assembly to a potential sufficiently high so as to render the elements of said first assembly into a state whereby said elements of said first assembly emit ions of one polarity;
- (c) a second assembly of elements with each having a sharp end;
- (d) means for taking said second assembly to a potential sufficiently high so as to render the elements of said second assembly into a state whereby said elements of said second assembly emit ions of the other polarity;
- (e) said first and second assemblies being arranged parallel and near of each other with all of the sharp ends of said elements directed to the same side so that an ion plasma is produced between the elements of said first assembly and the elements of said second assembly;
- and
- (f) means for modulating the potential difference applied to elements of said first and second assemblies by a low frequency voltage which analogically represents sound waves so that said ion plasma oscillates at the frequency of the modulating voltage and emits sound waves.
Electro-acoustic transducer device comprising:
- (a) a first assembly of elements with each having a sharp end;
- (b) means for taking said first assembly to a potential sufficiently high so as to render the elements of said first assembly into a state whereby said elements of said second assembly emit ions of one polarity;
- (c) a second assembly of elements with each having a sharp end;
- (d) means for taking said second assembly to a potential sufficiently high so as to render the elements of said second assembly into a state whereby said elements of said second assembly emit ions of the other polarity;
- (e) said first and second assemblies being arranged parallel and near of each other with all of the sharp ends of said elements directed to the same side so that an ion plasma is produced between the elements of said first assembly and the elements of said second assembly;
- and
- (f) means for applying sound waves onto the ion plasma so that the ionization potential difference applied to said elements is modulated by a low frequency voltage which analogically reproduces the sound waves.
Dependencies are inferred from the claim text.