The 0700 Series
The 0700 Series
In-plane MEMS Directional Microphone
The SKR0710 is Soundskrit’s first directional microphone with in-plane sound ports. With both sound ports embedded into the PCB of the microphone, the SKR0710 integrates into end products in a similar fashion to traditional omnidirectional MEMS microphones. It is ideal for constrained form factors such as smart glasses, earbuds, and other wearable devices.
Specifications
The SKR0710 can be paired with an omnidirectional microphone to create cardioid beamformers with consistent directivity across the full audible range. Both microphones sit side-by-side, eliminating the spacing required by conventional omnidirectional arrays.
Directionality Pattern | Switchable |
|---|---|
SNR | 66 dBA |
Frequency Range | 20Hz – 20kHz |
Total Footprint | 3.00mm x 9.87mm |
Our Unique MEMS Design
In-Plane Sound Ports
Both sound ports are embedded inside the PCB of the microphone, simplifying integration into end products
Built-in Directionality
The inherent directionality of the SKR0710 helps isolate users’ voices from background noise with exceptional clarity.
Multiple Directional Modes
When paired with an omnidirectional microphone, the SKR0710 can easily be configured to provide a dipole, hypercardioid, supercardioid, or cardioid polar pattern
Thin Form Factor
The thin form factor of the SKR0710 make it ideal for space constrained applications such as smart glasses, earbuds, and other wearable devices.
Standalone, the SKR0710 uses a gasket and asymmetric meshing to produce a fixed supercardioid in hardware — no software needed — optimized for voice up to 8 kHz. When paired with an omnidirectional microphone, signal processing combines the two to create a switchable cardioid across the full 20 Hz – 20 kHz range.
SNR is the most impactful factor. We recommend a PDM omnidirectional microphone with an SNR of >68 dBA for best performance. Both microphones should run through the same codec.
On the side opposite the SKR0710’s lid marking, as close as possible. The dipole and omnidirectional microphones should be placed in-line with one another.
A 3.072 MHz clock and 1.8 V supply. Lower clock rates increase high-frequency noise and reduce SNR; higher clocks or voltages only increase current draw with no performance benefit. Use a PDM interface with ≥24-bit resolution for maximum SNR.
Application Notes
Attributes of Directional MEMS Microphones
AN-110 walks through key attributes of Soundskrit’s directional microphones such as directionality, SNR, acoustic path length, and more.
Beamforming with the SKR0710
AN-242 describes how to appropriately combine an omnidirectional microphone with the SKR0710 in order to achieve optimal beamforming performance.
Using the SKR0710 as a Standalone Microphone
AN-320 describes how to use a gasket to enhance the directivity and SNR of the SKR0710 microphone.
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