Fat sound creation means
OwnerEric K. Pritchardinventor
Life of this patent
Estimating the term…
Abstract
Intermodulation means for the emulation and exaggeration of an aspect of vacuum tube amplifiers by solid state, digital, speaker or other means. The intermodulation means produces intermodulation products of the input and an audio signal source which may be a spectrum-limited, filtered version of the input or the output or a spectrum-limited repetitive or random noise generator.
Claims56
An audio amplifier system improved by an intermodulation distortion enhancement means having an audio input and an audio output for producing an audio signal enhanced by intermodulation products comprising:
- a limited upper frequency audio spectrum source for producing a limited upper frequency audio signal having a minus 3 db high frequency roll-off point at or above 50 Hz or a resonant frequency at or above 50 Hertz which is either an independent source or a rectifier-less filter means deriving its input from said amplifier;
- and
- a non-thermionic non-linear means responsive to said audio input and said limited upper frequency signal for producing an output signal which includes, whether clipping or not clipping, signal components of the input signal and intermodulation products of said input and limited upper spectrum audio signals and comparatively little or no limited upper spectrum audio signal.
A solid state intermodulation distortion enhancement means for creating an enhanced audio signal and having an input and an output comprising:
- low audio frequency rectifier-less low-pass filter having a minus 3 db point at or above 50 Hertz or band-pass filter means having center frequency at or above 50 Hertz for passing at least one of said input or said output signals as a filter signal;
- non-linear means responsive to said input and filter signals for producing an output signal which includes, whether clipping or not clipping, signal components of the input signal and intermodulation products of said input and filter signals and comparatively little or no filter signal.
A modulation means for a speaker for enhancing the output of said speaker and having input terminals, a voice coil and a permanent magnetic structure having a permanent magnet operable over the operating range of said speaker including:
- a field winding means mechanically separate from said voice coil for altering the magnetic field of said permanent magnetic structure, said field winding being part of or forming a rectifier-less filter having a minus 3 db high frequency roll off point at a frequency greater than 50 Hertz;
- so that
- the sound from said speaker includes components from the interaction said voice coil and said permanent magnet and the intermodulation distortion components from the interaction of the voice coil and said field winding as energized from said input terminals;
- wherein
- the sounds produced by said field coil are comparatively less than the sounds produced by said voice coil.
A modulation means for a speaker for enhancing the output of said speaker and having input terminals, a voice coil and a permanent magnetic structure including
- a field winding means mechanically separate from said voice coil for altering the magnetic field of said permanent magnetic structure, said field winding being part of or forming a rectifier-less filter having a minus 3 db high frequency roll off point at a frequency greater than 50 Hertz so that said voice coil so that the sound from said speaker includes components from the interaction said voice coil and said permanent magnet and the intermodulation distortion components from the interaction of the voice coil and said field winding as energized from said input terminals;
- and
- compression means connecting said voice coil to said filter for compressing said field winding signal.
Intermodulation distortion enhancement means for a push-pull amplifier having an input and an output and a plurality of output means having inputs for producing said output including
- limited upper frequency spectrum audio source having a minus 3 db high frequency roll off point at or above 50 Hertz;
- and
- connection means for connecting said limited upper frequency spectrum source to said inputs of said plurality of output means so that the limited upper frequency audio source is at least partially canceled by said output means.
Dependencies are inferred from the claim text.