Recording and playback equipment: Substrate-borne vibrations and video were recorded with a phonograph cartridge
(Model 91T, Astatic, Solon, OH) and a custom-made amplifier, connected to a digital video camera (Model PV - DV400D, Panasonic, Secaucus, NJ).
Lilla, Brazil's largest coffee equipment manufacturer, established itself in 1918, a year that is marked with other innovations such as the stainless steel thermos bottle and the phonograph cartridge
First, it must boost the output of the small signal generated by the phonograph cartridge
to a level sufficient to be properly utilized by the system preamplifier.
A phonographic tone arm, with the needle of the phonograph cartridge
acting as an electromagnetic transducer, was placed on the Sawbones adjacent to the outer shell and the impact signal transmitted to a laptop computer through a preamplifier--a technique previously used to measure impacts in the femur.
What's going on here: The $ensible Sound reviewing a phonograph cartridge
retailing for more than a thousand dollars?
Arguably the most accurate phonograph cartridge
made at any price, and the one that will treat your vinyl with the most tender loving care.
Cage's Cartridge Music (1960), which amplifies various objects with phonograph cartridges
, follows; while not expressly associated with computers, its presence is a nod to machine-made indeterminacy, illustrating Schmidt's assertion that "randomness (decision avoiding, or more concisely, leaving a decision to chance within an exactly specified range of possibilities) is one of the most important tools of the computer composer.
For recording signals there are laser vibrometers, accelerometers, phonograph cartridges
(record needles), and paper-thin piezo-electric strips.