초록 ▼

A microphone system for use in an environment where an acoustic source emits energy from diverse and varying locations within the environment. The microphone system has at least two directional microphones, mixing circuitry, and control circuitry. The microphones are held each directed out from a ce

A microphone system for use in an environment where an acoustic source emits energy from diverse and varying locations within the environment. The microphone system has at least two directional microphones, mixing circuitry, and control circuitry. The microphones are held each directed out from a center point. The mixing circuitry combines the electrical signals from the microphones in varying proportions to form a composite signal, the composite signal including contributions from at least two of the microphones. The control circuitry analyzes the electrical signals to determine an angular orientation of the acoustic signal relative to the central point, and substantially continuously adjusts the proportions in response to the determined orientation and provides the adjusted proportions to the mixing circuitry. The values of the proportions are selected so that the composite signal simulates a signal that would be generated by a single directional microphone pivoted about the central point to direct its maximum response at the acoustic signal as the acoustic signal moves about the environment.

대표청구항 ▼

A microphone system for use in a conference environment where an acoustic source emits energy from diverse and varying locations within the environment, comprising: at least two directional microphones held in a fixed arrangement about a center point, the respective response of each said microphone

A microphone system for use in a conference environment where an acoustic source emits energy from diverse and varying locations within the environment, comprising: at least two directional microphones held in a fixed arrangement about a center point, the respective response of each said microphone being directed radially away from said center point in a different direction, each said microphone able to receive an acoustic signal and produce an electrical signal in response, said microphones comprising two dipole microphones oriented at 90°from each other; mixing circuitry to combine said electrical signals in varying proportions to form a composite signal, said composite signal including contributions from at least two of said microphones; and control circuitry configured to analyze said electrical signals to determine an angular orientation of the acoustic signal relative to said central point, and to substantially continuously adjust said proportions in response to said determined orientation and provide said adjusted proportions to said mixing circuitry, the values of said proportions selected so that said composite signal simulates a signal that would be generated by a virtual directional microphone pivoted about said central point to direct its maximum response at the acoustic signal as the acoustic signal moves about the environment.