Search Results for: Sound reproducing apparatus
ma rs. , . new high voltage tester "sigma", - kv dc, - ma rs. , . new high voltage tester "sigma", - kv ac, - ma rs. , . new high voltage tester "sigma", - kv ac, - ma rs. , . new digital micro ohm meter "agronic", / digit rs. , . new digital temperature cum humidity meter "sigma" rs. . new digital sound
cable length & fault locator, digital milliohm meter (conductor resistance meter / cr meter), digital ohm meter, comparator, digital micro ohm meter, digital power analyzer, digital capacitance meter, oscilloscope, digital panel meter, digital watt meter, digital frequency counter, digital lux meter, sound...
http://www.sigmainstruments.com/products_new.php
radio frequency radio frequency (rf) energy, in the form of radiating waves or electrical currents, has been used in medical treatments for over years, [ ] generally for minimally invasive surgeries using radiofrequency ablation including the treatment of sleep apnea . [ ] measurement[ edit ] test apparatus
electromagnetic field therapy spectrum management references[ edit ] ^ j. a. fleming, the principles of electric wave telegraphy and telephony, london: longmans, green & co., , p. ^ a. a. ghirardi, radio physics course, nd ed. new york: rinehart books, , p. ^ curtis, thomas stanley ( ). high frequency apparatus...
https://en.wikipedia.org/wiki/Radio-frequency
(p. ) july, , . john broadwood. position, of wrest pins and dampers, also making the "sounding post, that communicates the sound to a sounding board, of the same thickness and quality as that on which the bridge is fixed."
teliochordon". besides the ordinary ones, two other bridges are placed nearer to the hammers, but in a just, proportion, according to the musical division of the string." metal bars press down the strings by means of pedals, causing the original bridges to lose their power, thereby producing a more acute sound...
https://www.piano-tuners.org/history/patents.html