Products

Audio Devices

MEMS Microphones

• MaxRF models eliminate GSM/TDMA burst noise and provide wide-band
• RF noise suppression
• UltraMini footprint – less than 11.5mm
• Slim UltraMini footprint – less than 8.5mm
• Digital mics eliminate analog noise
• Integrated designs with differential or switchable gain
• “Zero height” for thinnest ever designs

Built on our CMOS/MEMS technology platform (originally launched in 2002), the SiSonic™ silicon-based microphone series is entering its fourth generation of development, with product shipments exceeding 1 billion units to date. The proven and evolving design series continues to support high-performance, high-density innovation in such applications as cell phones, digital still cameras, portable music players, and other portable electronic devices.

Dynamic Speakers

• High quality and robustness
• Maximized space efficiency
• Excellent audio performance-to-size ratio
• Optimized for all mobile sound applications (handsfree and ringtone)
• Multi-functional devices including vibration
• Dedicated application support

Knowles dynamic speakers are designed to maximize space efficiency and provide superior audio performance for voice and music in small, slim consumer devices, such as mobile handsets or smartphones.
They are available in various sizes and performance levels, which can be customized to meet your specific requirements. Dedicated support is provided to realize the optimal sound performance in your application.
To assure highest quality standards, the speakers are manufactured in a process that uses 100% in-line measurement of all specified acoustical and electrical parameters.

Dynamic Receivers

• High quality and robustness
• Maximized space efficiency
• Excellent audio performance-to-size ratio
• Optimized for use in mobile devices
• Optional Hearing Aid Compatibility (HAC)
• Dedicated application support

Knowles dynamic receivers, also known as ear-piece speakers, are designed to maximize space efficiency and audio performance in small, slim consumer devices, such as mobile handsets or smartphones.
Knowles dynamic receivers are available for narrow or wide band applications in various sizes and performance levels, which can be finely tuned to meet your specific requirements. Dedicated support is provided to realize the optimal sound performance in your application.
To assure highest quality standards, the receivers are manufactured in a process that uses 100% in-line measurement of all specified acoustical and electrical parameters.

Balanced Armature Speakers

• Balanced-armature, magnetic technology
• High efficiency, stability, and reliability
• Customizable performance and port locations
• Ideal for premium in-ear designs
• Component and subassembly solutions

This sub-miniature speaker designs are based on balanced armature technology, utilized in a variety of high performance audio and communication products.
The balanced armature speakers are available in several sizes and efficiencies, which can be finely tuned to meet your specific performance requirements.
They can be designed to fit inside ear molds, attach to earpieces, or be sub-assembled by Knowles for premium consumer electronics accessories.

Electret Microphones

• Wide range of size and performance options
• Magnetic, piezo ceramic and electret condenser
• Low noise and RF filtering versions

Hundreds of design possibilities can be applied to your product challenge with our high-performance microphone designs. Ideal for new product ideas that require premium audio and very small form factors, solutions include noise canceling, omni-directional and unidirectional performance. Other variables include size, shape, amplification, sensitivity, low noise, and resistance to vibration and mechanical shock.

Booms Microphones

• Standard and waterproof
• Flexible and rigid styles
• Boom housing available in plastic and metal
• Customized lengths and end terminations

Knowles’ boom microphones are designed for either flexible or rigid configurations and offer such performance options as noise rejection and high-frequency crossover of near and far field responses. Lengths and end terminations are customized to meet your application needs.
Marketers of headsets and audio systems often seek Knowles boom designs. Collaboration with commercial, governmental and industrial designers is producing new helmet applications for aircraft, military, first responder and high-noise manufacturing environments.

Acoustic Dampers

• Smoothen and shape frequency response
• Various acoustical resistances and sizes

Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the receiver outlet and the ear canal to smoothen the frequency response. Various acoustical resistances and sizes are available.

Accelerometers

BU Series Accelerometers are frequently used as contact microphones for radio
communications in high noise environments. The accelerometers reproduce voice signals
from vibrations at the throat or from bony parts of the head, and are compatible with
helmet or headset applications.

• Ceramic vibration transducer
• High vibration sensitivity
• Small size
• Wide frequency range
• Integral FET amplifier
• High resistance to mechanical shock
• Withstands severe environmental conditions