Electroacoustical components
Microphones
Electro acoustical components from Knowles
Hearing Instrument Microphones
• Complete range of configuration options
• Wide range of size and performance options
• Custom crafted designs
Knowles’ continues to drive the design and development of new microphone solutions for hearing aids. Developments include unidirectional, omni-directional, matched pairs, and combined uni-omni microphone designs. Behind-the-ear, in-the-ear,in-the-canal, completely in-the-canal, and new cochlear completely in-the-ear solutions are refined through variables such as shell size, RFI suppression, sound damping, port configuration, frequency response, shock resistance and more.
| Image | Series | Dimensions | Features |
|---|---|---|---|
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EA series | 5.56mm x 3.98mm x 2.21mm(.219in x .157in x .087in) |
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EK/EY series | 5.56mm x 3.98mm x 2.21mm (.219in x .157in x .087in) |
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EL series | 4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in) |
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EM/BEM series | 3.61mm x 3.61mm x 2.21mm (.142in x .142in x .087in) |
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FG/BFG series | 2.59mm dia. x 2.59 mm (0.102in dia. x 0.102in) |
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MQM series | 3.35mm x 2.50mm x 0.96mm (.131in x .098in x .038in) |
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QM series | 4.00mm x 3.00mm x 1.17mm (.157in x .118in x .046in) |
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TD series | 3.61mm x 3.61mm x 1.30mm (.142in x .142in x .051in) |
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TM/BTM series | 3.61mm x 3.61mm x 1.30mm (.142in x .142in x .051in) |
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TO/BTO series | 3.61mm x 3.61mm x 1.30mm (.142in x .142in x .051in) |
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TP series | 3.61mm x 3.61mm x 2.59mm (.142in x .142in x .103in) |
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Surface mount MEMs
• New 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 3 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.
Design variables include ever-smaller sizes, lower profiles and mounting options, increased output capacities, and new digital audio options that eliminate analog noise. For manufacturers, surface mount designs eliminate off-line subassembly production costs. Customized designs are supplied on tape-and-reel and can be run through standard automatic pick-n-place equipment during in-line surface mount manufacturing.
The microphones can also be integrated with our patented IntelliSonic™ software and special porting designs to provide a precisely customized sound.
| Product Families | Model ID | Dimensions | RF Immunity | Sensitivity @1kHz (dB relV/1Pa) | Description | Supply Voltage (min-max) | Output Impedance (ohms) | Maximum Current Drain (uA) | Port Location | Downloads |
|---|---|---|---|---|---|---|---|---|---|---|
| SP | SPA2629LR5H | 3.35mm x 2.50mm x 0.98mm | Maximum | -38.0 | Unity Gain | 1.5 to 3.6v | <400 | <165 | Bottom | |
| SP | SPH0611LR5H-1 | 3.50mm x 2.65mm x 0.98mm | Maximum | -38.0 | Unity Gain | 1.5 to 3.6v | <400 | <185 | Bottom | |
| SP | SPK0415HM4H | 4.00mm x 3.00mm x 1.06mm | Digital Enhanced | -26.0 (dBFS/1Pa) | Digital | 1.6 to 3.6v | 100pf Maximum Load | <650 | Top | |
| SP | SPK0833LM4H | 4.00mm x 3.00mm x 1.00mm | Digital Enhanced | -26.0 (dBFS/1Pa) | Digital | 1.6 to 3.6v | 160pf Maximum Load | <700 | Bottom | |
| SP | SPM0408LE5H | 4.72mm x 3.76mm x 1.25mm | Enhanced | -18.0 | Amplified | 1.5 to 3.6v | <200 | <350 | Bottom | |
| SP | SPM0423HD4H | 4.72mm x 3.76mm x 1.25mm | Digital Standard | -26.0 (dBFS/1Pa) | Digital | 1.6 to 3.6v | 100pf Maximum Load | <600 | Top | |
| SP | SPM0437HD4H | 4.72mm x 3.76mm x 1.25mm | Digital Standard | -26.0 (dBFS/1Pa) | Digital | 1.6 to 3.6v | 160pf Maximum Load | <500 | Top | |
| SP | SPM1423HM4H | 4.72mm x 3.76mm x 1.25mm | Digital Enhanced | -22.0 (dBFS/1Pa) | Digital | 1.6 to 3.6v | 100pf Maximum Load | <600 | Top | |
| SP | SPM1437HM4H | 4.72mm x 3.76mm x 1.25mm | Digital Enhanced | -22.0 (dbFS/1Pa) | Digital | 1.6 to 3.6v | 160pf Maximum Load | <500 | Top | |
| SP | SPQ0410HR5H | 3.76mm x 2.24mm x 1.10mm | Maximum | -42.0 | Unity Gain | 1.5 to 3.6v | <400 | <160 | Top | |
| SP | SPQ1410HR5H | 3.76mm x 2.24mm x 1.10mm | Maximum | -42.0 | Unity Gain | 1.5 to 3.6v | <400 | <160 | Top | |
| SP | SPU0410HR5H-1 | 3.76mm x 2.95mm x 1.10mm | Maximum | -42.0 | Unity Gain | 1.5 to 3.6v | <400 | <160 | Top | |
| SP | SPU0410LR5H-1 | 3.76mm x 3.00mm x 1.10mm | Maximum | -38.0 | Unity Gain | 1.5 to 3.6v | <400 | <160 | Bottom | |
| SP | SPU0414HR5H | 3.76mm x 2.95mm x 1.10mm | Maximum | -22.0 | Amplified | 1.5 to 3.6v | <400 | <220 | Top | |
| SP | SPU1410LR5H | 3.76mm x 3.00mm x 1.10mm | Maximum | -38.0 | Unity Gain | 1.5 to 3.6v | <400 | <160 | Bottom | |
| SP | SPV0840LR5H | 2.75mm x 1.85mm x 0.9mm | Maximum | -38.0 | Unity Gain | 1.5 to 3.6v | <400 | <60 | Bottom | |
| SP | SPW2430HR5H | 3.10mm x 2.50mm x 1.00mm | Maximum | -42.0 | Unity Gain | 1.5 to 3.6v | <450 | <110 | Top |
Boom
• 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.
| Product Families | Model ID | Rating | Microphone Element | Directional | Boom Length Tip-To-Tip(mm) | Waterproof | Exit Wire Length(mm) | Nominal Boom Dia. (mm) | Microphone Configuration | Downloads |
|---|---|---|---|---|---|---|---|---|---|---|
| FB | FB-AE-30209-000 | n/a | MB6022ASC-1 | Omni-directional | 127 (positionable cable) | No | 60 | 2.7 | 2-WIRE | |
| FB | FB-AE-30389-000 | n/a | MB6022NSC-0C | Noise Canceling | 127 (positionable cable) | No | 60 | 2.7 | 2-WIRE | |
| FB | FB-BW-30330-000 | IP54 | NR-25994-D63 | Noise Canceling | 160 | No | 60 | 2.7 | 2-WIRE | |
| FB | FB-BW-30335-000 | 3m | WP-25993-D63 | Noise Canceling | 160 | No | 60 | 2.7 | 2-WIRE | |
| FB | FB-DE-30290-000 | n/a | MB6022NSC-0C | Noise Canceling | 140 | No | 60 | 4.2 | 2-WIRE | |
| FB | FB-DE-30291-000 | n/a | MB6022ASC-1 | Omni-directional | 140 | No | 60 | 4.2 | 2-WIRE | |
| FB | FB-DE-30292-000 | n/a | MB6022USC-3 | Uni-directional | 140 | No | 60 | 4.2 | 2-WIRE | |
| FB | FB-DO-23511-000 | 3m | WP-23501-000 | Noise Canceling | 142 | No | 150 | 4.2 | 2-WIRE | |
| FB | FB-DO-25946-000 | 3m | WP-23501-000 | Noise Canceling | 54 | No | 30 | 4.2 | 2-WIRE | |
| FB | FB-DW-30293-000 | IP54 | NR-25994-D63 | Noise Canceling | 140 | No | 60 | 4.2 | 2-WIRE | |
| FB | FB-DW-30294-000 | 3m | WP-25993-D63 | Noise Canceling | 140 | No | 60 | 4.2 | 2-WIRE | |
| FB | FB-DW-30295-000 | IP54 | NR-25994-000 | Noise Canceling | 140 | No | 60 | 4.2 | 3-WIRE | |
| FB | FB-DW-30296-000 | 3m | WP-25993-000 | Noise Canceling | 140 | No | 60 | 4.2 | 3-WIRE | |
| FB | FB-EI-30026-000 | 1m | BJ-28471-000(150 ohms Impedance) | Noise Canceling | 172 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EI-30426-000 | 1m | BJ-28486-000 (30 ohms Impedance) | Noise Canceling | 172 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EM-30342-000 | 1m | NR-25994-D63 | Noise Canceling | 167 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EM-30343-000 | 3m | WP-25993-D63 | Noise Canceling | 167 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EM-30344-000 | 10m | NR-25994-D63 | Noise Canceling | 167 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EM-30345-000 | 20m | NR-25994-D63 | Noise Canceling | 167 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EM-30346-000 | 1m | EK-23132-C36 | Omni-directional | 167 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EM-30348-000 | 10m | EK-23132-C36 | Omni-directional | 167 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-EM-30349-000 | 20m | EK-23132-C36 | Omni-directional | 167 | No | 60 | 5.4 | 2-WIRE | |
| FB | FB-FO-25581-000 | n/a | EK-23024-000 | Omni-directional | 104 | No | 140 | 5.9 | 2-WIRE | |
| FB | FB-HO-25624-000 | 3m | WP-23501-000 | Noise Canceling | 142 | No | 160 | 5 | 2-WIRE |
Magnetic
• Robust reliability and high performance
• Does not require a bias voltage
Knowles offers boom microphones that utilize magnetic microphone elements. These elements generate their own signal and, unlike traditional dynamic microphones, do not require a bias voltage. This feature can be helpful to ensure compatibility with radios.
BJ-based boom microphones have been chosen over dynamic microphones to upgrade performance and reliability for military and first responder applications.
| Product Families | Model ID | Dimensions | 1 kHz sensitivity | Port Location | Directional | Downloads |
|---|---|---|---|---|---|---|
| BJ | BJ-21590-000 | 7.92mm x 5.70mm x 4.14mm (.312in x .224in x .163in) |
-75 | 0Jn | Omni-directional | |
| BJ | BJ-28411-000 | 7.92mm x 5.70mm x 4.14mm (.312in x .224in x .163in) |
-88 | 0n / 12n | Noise Canceling |
Waterproof
• Highly waterproof and submersible
• Withstand explosive decompression
• Excellent environmental performance
• Corrosion resistant
Knowles’ waterproof microphones are designed to survive complete immersion in water. Form factors include a miniature design that can be immersed in water to a depth of one meter, and a bellows design for depths to 15 meters. The bellows design may be panel mounted and is suitable for outdoor use and repeated submersion. The miniature design offers excellent noise canceling performance that is ideal for underwater sensors and instrumentation.
MR Series
MR Series microphones combine a conventional element with a waterproof bellows assembly. The bellows conducts sound to the element and survives 15m (50 feet) of submersion in water. They may be panel mounted, attached for boom applications and are suitable for outdoor use or repeated submersion.
| Product Families | Model ID | Dimensions | 1kHz Sensitivity | Response | Directional | Noise Max (Input Ref.) | Noise Max (Output Noise) | Downloads |
|---|---|---|---|---|---|---|---|---|
| MR | MR-23151-000 | 12.7 dia x 22.23mm (0.5 dia x 0.875in) | -87.5 | 12 dB/oct | Omni-directional | n/a | n/a | |
| MR | MR-28406-000 | 12.7 dia x 22.23mm (0.5 dia x 0.875in) | -60 | Std | Omni-directional | 30 dB | n/a |
WP Series
Form factors include a miniature design that can be immersed in water to a depth of one meter, and a bellows design for depths to 15 meters. The bellows design may be panel mounted, attached for boom applications and is suitable for outdoor use and repeated submersion.
| Product Families | Model ID | Dimensions | 1kHz Sensitivity | Response | Directional | Noise Max (Input Ref.) | Noise Max (Output Noise) | Downloads |
|---|---|---|---|---|---|---|---|---|
| WP | WP-23501-053 | 4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in) | -54 | Flat | Noise Canceling | n/a | -100 dB | |
| WP | WP-23502-000 | 4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in) | -52 | Flat | Omni-directional | 25 dB | n/a | |
| WP | WP-23849-C36 | 4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in) | -52 | Flat | Omni-directional | 25 dB | n/a |
Piezo ceramic
• Ceramic vibration designs
• High vibration sensitivity
• High resistance to mechanical shock
The piezo ceramic microphone series is rugged, stable, and versatile. Design variables include standard, thin, or a one-half inch cylindrical shell with a cable assembly. Both communication and broadband frequency responses are available. The series features high vibration sensitivity and may be used as accelerometers.
| Product Families | Model ID | Dimensions | 1 kHz sensitivity | Port location | Noise Max (Input Ref.) | Noise Max (Output Noise) | Downloads |
|---|---|---|---|---|---|---|---|
| BL | BL-21671-000 | 7.92mm x 5.59mm x 2.28mm (.312in x .220in x .090in) | -54.5 | 12S | 32 dB | n/a | |
| BL | BL-21785-000 | 7.92mm x 5.59mm x 2.28mm (.312in x .220in x .090in) | -69 | 12S | 34 dB | n/a | |
| BL | BL-21994-000 | 7.92mm x 5.59mm x 2.28mm (.312in x .220in x .090in) | -69 | Top | 34 dB | n/a | |
| BL | BL-23497-000 | 7.92mm x 5.59mm x 2.28mm (.312in x .220in x .090in) | -69 | Top | 34 dB | n/a |
Subminiature performance
• 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.
| Image | Series | Dimensions | Features |
|---|---|---|---|
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EA series | 5.56mm x 3.98mm x 2.21mm (.219in x .157in x .087in) |
|
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EK/EY series | 5.56mm x 3.98mm x 2.21mm (.219in x .157in x .087in) |
|
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EL series | 4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in) |
|
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EM/BEM series | 3.61mm x 3.61mm x 2.21mm (.142in x .142in x .087in) |
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FG/BFG series | 2.59mm dia. x 2.59 mm (0.102in dia. x 0.102in) |
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GA series | 2mm x 2mm x 4mm |
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NR series | 4.00mm x 5.59mm x 2.28mm (.157in x .220in x .090in) |
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