System and method for adjusting the low-frequency response of a crossover that supplies signal to subwoofers in response to main-speaker low-frequency characteristics
AssigneeThiel Audio Products
InventorJames Thiel
Life of this patent
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Abstract
A system and method for adjusting a subwoofer sonic output in response to known main speaker characteristics in order to produce a desirable blending of sound from the combined subwoofer-main speaker output.
Claims19
A system for adjusting the frequency response of subwoofer systems comprising:
- a user interface configured to receive user-adjustable variables indicative of main speaker characteristics;
- and
- a compensation circuit configured to produce a desired low-frequency signal from an input signal in response to the user-adjustable variables, the compensation circuit comprising:
- a desired transfer function circuit having frequency response characteristics analogous to a desired subwoofer-main speaker combination, the desired transfer function circuit configured to produce a desired combined subwoofer-main speaker signal;
- an equivalent circuit having frequency response characteristics analogous to a main speaker, the equivalent circuit configured to produce a signal analogous to a main speaker signal;
- and
- a subtraction circuit configured to subtract the main speaker signal from the desired combined subwoofer-main speaker signal.
The system of 1, wherein the user adjustable variables comprise a low-frequency cutoff frequency.
The system of 1, wherein the user adjustable variables comprise a low-frequency damping factor.
The system of 1, wherein the user adjustable variables comprise a speaker sensitivity factor.
The system of 1, wherein the user adjustable variables comprise an enclosure type.
The system of 1, wherein the user adjustable variables comprise a gain factor.
A method for adjusting the frequency response of subwoofer systems, comprising the steps of:
- inputting user adjustable settings indicative of main speaker characteristics;
- and
- producing a desired low-frequency signal in response to the user adjustable settings, the step of producing the desired low-frequency signal comprising the steps of:
- generating a desired combined system signal from the user adjustable settings, the desired system signal having frequency response characteristics of a desired combined subwoofer-main speaker system;
- generating an equivalent main speaker signal from the user adjustable settings, the equivalent main speaker signal having frequency response characteristics analogous to that of the main speaker;
- and
- subtracting the equivalent main speaker signal from the desired combined system.
A system for adjusting the frequency response of subwoofer systems, comprising:
- means for inputting a plurality of user adjustable setting indicative of main-speaker characteristics;
- means for receiving an input signal;
- means for generating a desired combined system signal from the user adjustable settings, the desired system signal having frequency response characteristics of a desired combined subwoofer-main speaker system;
- means for generating an equivalent main speaker signal from the user adjustable settings, the equivalent main speaker signal having frequency response characteristics analogous to that of the main speaker;
- and
- means for subtracting the equivalent main speaker signal from the desired combined system signal.
Dependencies are inferred from the claim text.