Advanced audio solutions

As technology advances at an accelerated rate, consumers are demanding new and different ways to interact with their devices. They expect more convenient and personalized experiences. They want technology to sense their surroundings and adapt to their needs. At Knowles, we believe that the key to success and unlocking even greater potential lies in getting the most out of a single audio system.

Knowles is committed to advancing audio technology and enabling differentiated performance. Our long history as acoustic pioneers and deep expertise in audio performance and architecture uniquely positions us to deliver the next frontier for the smart responsive devices. Knowles is ready to evolve audio and advance clarity in life’s connections



Knowles is committed to advancing audio technology and enabling differentiated performance. Our proven performance in acoustics and sub-miniature audio solutions uniquely positions us to develop superior solutions. These technologies can be applied to mobile devices, wearables, smart home automation and security systems, remote controllers, automotive and more. Our latest audio solutions include an I²S digital MEMS microphone that connects directly to an application processor providing a more efficient architecture and increase battery performance, and VoiceIQ™ which is the world’s first “always listening” voice detector that automatically adapt its performance to the acoustic environment and enable voice wake-up solution on a mobile handset with significant power savings.

VoiceIQ™

Our latest innovation, VoiceIQ™, is the world’s first “always listening” voice detector capable to automatically adapt its performance to the acoustic environment and enable voice wake-up solution on a mobile handset with significant power savings.With VoiceIQ, consumers will be able to wake-up their portable device, launch specific commands by saying a single phrase, without touching the screen and expect a strong battery life. By embedding the software directly into the microphone, the intelligent sensor adapts to the noise in the environment, predicting the surroundings, such as a crowded restaurant versus a library, and dynamically adjusts its thresholds to detect user’s voice. This adaptive process decides when the rest of the audio chain must be awaken or in sleep mode creating a positive impact on the battery life.

Features
  • Multi-mode architecture to meet portable design use cases: voice call, video recording, voice trigger, etc.
  • Ultra low power consumption in “always listening” mode of 0.4 milliwatts (mW)
  • Built-in adaptive Acoustic Activity Detect (AAD) engine to detect acoustic signature of voice with best in class performance in noisy environments
  • Design with interrupt management to wake up downstream audio system pathways

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I²S Digital MEMS Microphone

In response to the growth of smaller, more efficient devices, Knowles developed the most advanced Inter-IC Sound, or I²S, interface MEMS microphone for wearables, smartphones, remote controllers, automotive, and smart appliances.Using this I²S interface, the bottom port digital MEMS microphone allows manufacturers to connect directly to an application processors or microcontrollers. The result is a more efficient architecture due to decreased complexity, increased battery performance, and a lower cost bill of material. As a result, Knowles’ solution is superior in size and power consumption, with a 25 percent smaller footprint and 50 percent lower current consumption than competitive products.The new technology easily integrates with existing mobile device architecture and simplifies system integration through a direct connection to signal processors.

Features
  • Direct attachment to applications processors (no audio codec necessary)
  • High performance requires less board space
  • Meet Super Wideband requirements
  • Far field capable with the possibility to connect dual MIC on same I2S bus
  • Low current consumption while maintaining high performance

ApplicationProcessor3

Product Families Model ID Dimensions Analog/Digital Port 1 kHz Sensitivity SNR Ultrasonic Boost Sensitivity Tolerance Max Current Draw Downloads
SPH SPH0645LM4H-B 3.50 x 2.65 x 0.98mm Digital Bottom -26 dBV 65 No +/- 3 dB 600
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(1.11 MB)



Knowles develops and manufactures integrated acoustic modules which are fully customized and provide an optimized acoustic design for any form factor. Our solutions are designed for higher audio performance and are optimal for mobile phones, tablets and other consumer electronics.

Features

  • Higher performing audio
  • Thinner handset designs
  • Antenna effectiveness; faster data
  • Faster design cycles
  • One-stop value chain
  • Tested and plug-in ready

Contact Us to discuss your speaker box design needs.

Turnkey solution

Module Integration

Knowles’ digital multi-mode ultrasonic microphone significantly improves ultrasonic SNR with our proprietary ultrasonic boost technology, enabling easier integration for precision applications. Digital microphones reduce the number of traces and inputs required, improve SNR, have superior noise immunity, and provide more functionality with multiple performance modes to end applications.

  • Ultrasonic Boost for Ultrasonic Support
  • Multiple Performance Modes (Sleep, Low Power, Standard, Ultrasonic Modes)
  • High SNR
  • Flat Frequency Response
  • Sensitivity Matching
  • RF Shielded
  • Omnidirectional

While Knowles industry-leading MEMS microphone technology, in bottom port configuration, offers flat frequency response in the standard audio bandwidth, they are also capable to support even higher frequency bands. Sensor designs are possible across a wide spectrum of applications requiring highly miniaturized solutions for sensing and actuation/signaling.

Features
  • High frequency functionality
  • Wide range of applications
  • Micro-sized sensing and actuation

Ultrasonic AAS

Product Families Model ID Dimensions Analog/Digital Port 1 kHz Sensitivity SNR Ultrasonic Boost Sensitivity Tolerance Max Current Draw Downloads
SPH SPH0641LU4H-1 3.50 x 2.65 x 0.98mm Digital Bottom -26 dBFS 64.3 dB Yes +/- 1 dB – 270 / Standard – 700 / Ultrasonic – 1000
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(937.42 kB)

SPH SPH1611LR5H-1 3.50 x 2.65 x 0.98mm Analog Bottom -38 dBV 65 No +/- 1 dB 185
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(1.15 MB)