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Audio and Acoustics Research

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Breakthroughs enabled with digital processing.

Introduction
Illusonic's patent pending acoustic "beam-shaping" technology simulates a virtual higher order directive microphone based on at least two first order microphone capsules. Directivity of the simulated microphone's signal is higher than any real microphone, while maintaining high signal fidelity. These highly directive virtual microphone signals are applied for different purposes by the technologies described in the following.

Highly Directive Sound Capture
The highly directive nature of the obtained signal enables sound capture with attenuated reverberation and noise.

High directive sound capure

Specifications: Highly Directive Sound Capture
Directivity Index (DI) Diffuse gain control Microphone capsules Microphone capsule type Algorithmic Delay	up to 10 dB -20 to 0 dB 2 omni or cardioid 1 - 15 ms

Coincident Stereo Post-Processing
Signals of conventional stereo microphones are post-processed to modify the width of the stereo image and spaciousness, without using any delays or artifical reverberation. This enables flexibility otherwise only known from B-format microphones.

Coincident Stereo Post-Processing

Specifications: Coincident Stereo Post-Processing
Directivity Index (DI) modification Diffuse gain control Microphone type Microphone capsule type Algorithmic Delay	0 to 6 dB -12 to 12 dB stereo coincident/nearly coincident cardioid, super-cardioid 3 - 15 ms

Two Channel 5.1 Surround Microphone
Signals of conventional stereo microphones are processed to simulate five virtual microphones to generate 5.1 surround audio.

Two Channel 5.1 Surrond Microphone

Specifications: Two Channel 5.1 Surround Microphone
Surround format Directivity Index (DI) Diffuse gain control LFE cutoff Microphone type Microphone capsule type Algorithmic Delay	5.1 4.8 to 10 dB -12 to 12 dB 120 Hz stereo coincident/nearly coincident cardioid, super-cardioid 3 - 15 ms

Three Channel N.1 Microphone
Signals of three coincident or nearly coincident microphones are processed to simulate N virtual microphones to generate N.1 surround audio.

Specifications: Three Channel N.1 Surround Microphone
Surround format Directivity Index (DI) Diffuse gain control LFE cutoff Microphone type Microphone capsule type Algorithmic Delay	2 to 10 channels 4.8 to 10 dB -12 to 12 dB 120 Hz coincident/nearly coincident cardioid 3 - 15 ms (programmable)