low-frequency energy
41Dark energy — Not to be confused with dark matter, dark fluid, or dark flow. Physical cosmology …
42Reuven Ramaty High Energy Solar Spectroscopic Imager — (RHESSI, or more rarely Explorer 81) is the sixth mission in the line of NASA Small Explorer missions (also known as SMEX). Launched on 5 February 2002, its primary mission is to explore the basic physics of particle acceleration and explosive… …
43Cutoff frequency — This article is about signal processing. For other uses, see Cutoff (disambiguation). Magnitude transfer function of a bandpass filter with lower 3 dB cutoff frequency f1 and upper 3dB cutoff frequency f2 …
44Ultra high frequency — (UHF) designates a range (band) of electromagnetic waves with frequencies between 300 MHz and 3 GHz (3,000 MHz). Also known as the decimeter band or decimeter wave as the wavelengths range from ten to one decimeters. Radio waves with frequencies… …
45German nuclear energy project — Germany nuclear energy project The German experimental nuclear pile at Haigerloch. Active …
46Mel-frequency cepstrum — In sound processing, the mel frequency cepstrum (MFC) is a representation of the short term power spectrum of a sound, based on a linear cosine transform of a log power spectrum on a nonlinear mel scale of frequency. Mel frequency cepstral… …
47Federal Department of Environment, Transport, Energy and Communications — Department of Posts and Telegraph redirects here. For the Irish governmental department, see Department of Posts and Telegraphs. Federal Department of Environment, Transport, Energy and Communications Agency …
48Statistical Energy Analysis — or SEA is a method for predicting vibration transmission in dynamical systems made of coupled acoustic cavities and structures. The vibrational behavior of the system is described in the energy domain. The energy is here the potential and kinetic …
49Cathode Disconnect Ballast — An electromagnetic ballast that disconnects a lamp s electrode heating circuit once is has started; often called low frequency electronic ballasts …
50Subwoofer — A subwoofer is a woofer, or a complete loudspeaker dedicated to the reproduction of bass audio frequencies, from perhaps 150 Hz down as far as 20 Hz, or in rare cases lower. Also known as subs , these are used to augment the low frequency… …
