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Active Noise Cancelation Technology and Applications 2018
Noise is a Serious Pollution!
“Excessive noise seriously harms human health and interferes with people’s daily activities.”
“Traffic noise alone is harmful to the health of almost every third person.” Guidelines for Noise
Night
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- WHO Regional Office for Europe -
Noise Polluters and Traditional Solutions
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Zonal Noise Polluters
Noise coming from many sources surrounding us
Point Noise Polluters
Noise from a specific source that can be identified and controlled
Personal Headphones
Passive Barriers
Cumbersome
Block or abstract airflow
Require specific designated devices/structure
Not able to reduce low frequency
dB
Traditional SolutionsPolluters
ANC Basics
An “anti-noise” signal which
destructively interferes with the original
sound and cancels it out
Original Noise Wave
Anti-noise Wave
Cancellation
ANC is a basic rule of Physics
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ANC Controller
Ref Sensor
Noise Source
Monitoring Sensor
ANC requires a combination of hardware and algorithm
ANC Advantages and Challenges
Technical challenges to overcome in applying ANC in real life.
EngineeringChallenges
• Durability
• Adaptability
• Available Space
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Allow Airflow
Recue low frequencydB
Save weight
Save engineering
ANC has many advantages over traditional passive noise solutions, however…
AcousticChallenges
• Eco Canceling
• Group Delay
• Acoustic Field Overlap
Silentium ANC Technology
Proprietary Algorithms
Based on unique algorithms
developed by Silentium to
overcome the acoustic challenges
in applying ANC
Experienced and Dedicated Team
15 years of experience in ANC
technology development and
application
45+ professional engineers
dedicated only to ANC technology
Proven Performance
Outstanding effectiveness in low
frequency and broadband
A number of applications are
already in mass production or
production intent programs
Uniquely patented in many
countries
Unique Patents
Silentium provides spatial, broadband, adaptive Active Noise Reduction solutions.
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Global Presence
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-Israel,Tel AvivHeadquarters and R&D
-Hong Kong
-China, ShanghaiEngineering center
-Korea
-UK, London
-USA, Boston
Key Building Blocks and Applications
Quiet Bubble：
Zonal Noise Reduction
Ducted ANC：
Point Noise Reduction
Building Blocks
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ANC Headsets：
Noise Reduction at Ear
Automotive, Trains, AerospaceEarphones, Headphones White Goods, Industrial Equipment
ANC Headsets:Solution and Applications
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Silentium ANC Advantages for Headsets
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Proven high performance based on advanced algorithm
Flexible customization to enhance Audio and Voice applications
Soft ANC solution reduces BOM cost
Short time to market by leveraging Silentim’swide technical support coverage
Silentium Powered Headset Performance
200 400 600 800 1000 120040
50
60
70
80
90
100
Frequency [Hz]
Energ
y [
dB
]
Dual Power Spectrum - BOSE "QuietComfort3"
Active Noise Reduction = 4.08 dB(A)
ANC ON
ANC OFF
200 400 600 800 1000 120040
50
60
70
80
90
100
Frequency [Hz]
Energ
y [
dB
]
Dual Power Spectrum - Philips "SHN9500"
Active Noise Reduction = 3.8236 dB(A)
ANC ON
ANC OFF
200 400 600 800 1000 120040
50
60
70
80
90
100
Frequency [Hz]
Energ
y [
dB
]
Dual Power Spectrum - Silentium "S-Cube"
Active Noise Reduction = 11.97 dB(A)
ANC ON
ANC OFF
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200 400 600 800 100040
50
60
70
80
90
Frequency [Hz]
Energ
y [
dB
]
Dual Power Spectrum - Beyerdynaic "HS800"
Active Noise Reduction = 6.94 dB(A)
E = 16.1216 dB
ANC Off
ANC ON
• Broadband Reduction:Silentium up to 1000 Hz vs. others up to 600 - 800 Hz.
• Overall Performance:Silentium 12dB(A) vs. others 4dB(A)
A Headphone(Professional)
B Headphone(Consumer)
C Headphone(Consumer)
Silentium Algorithm on C Headphone
QB™: Quite BubbleSolution and Applications
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QB™ Solution
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The “Quiet Bubble™”
The Quiet Bubble™ is a spatial Active Noise Reduction solution introducing a personal quiet zone around the driver/passengers head.
Solution embedded into seats, infotainment/audio systems etc.
Already installed in vehicles in collaboration with OEMs and proved to be efficient in low-medium frequency noise reduction
QB™ Applications: Transportation
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Engine Order
HVAC
Road Noise
Wind Noise
Silentium‘s QB™ ANC technology for Automotive delivers more than 5dB(A) noise reduction across
the entire audible spectrum amd more than 10dB(A) at the dominant frequncies.
*Road noise reduction example
Personal Audio ZONE
▪ Target applications for Quite Bubble solution are global markets of:
- Passenger Cars - all segments inc. HEV/EV
- Sport Utility Vehicles - SUV
- Light Commercial Vehicles – LCV
- Autonomous Driving Vehicles
- Heavy Duty Trucks, Construction Vehicles
- Agricultural Vehicles /Tractors
- High speed train
- Airplanes and helicopters
QB™ Applications: Transportation
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QB™ Benefits
Silentium QB™ Benefits
Reduce Car Weight
• Weight reduction is one of most important challenges Automotive OEMs are facing due to CO2 emission reduction target
• Silentium QB™ saves significant amount of passive materials while maintaining the same or lower noise level
Enhance Speech Recognition
• The biggest obstacle to performance of in-car speech recognition system is noise from HVAC and Road
• Reduced noise from HVAC and Road enhances speech recognition performance
Improve HEV & EV
• Without noise from the engine or power train, and reduced weight, the road and HVAC noise will become more important for HEV & EV
• Silentium QB™ is particularly effective in reducing road noise and HVAC noise
Enable Personalized In-Car Audio
• Silentium QB™ can enable the personalized audio system
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Personal Audio
Enabling Personal & Private Audio
ARNC
Offering customer experience
Weight saving
AWNC
Offering customer experience
Weight saving
HVAC
Offering customer experience
Hands Free Communication
Enabling communication
spaces
Uniqueness of Silentium QB for Transportation
No.1 in terms of
performance and cost
UniqueProvider in the world
UniqueProvider in the world
Enabler Enabler
QB™ Applications: Comfort Shell
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Ducted ANC: Applications and Examples
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▪ Target applications for S-Fan solution are global markets of:
- Cooker hoods
- Air Purifiers
- Air-conditioning/Heat Exchangers
- Other consumer electronics
- Automotive HVAC
- Servers and computers
- Industrial cooling towers/fans/turbines
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Ducted ANC Applications
Range Hood Example (Faber/Electrolux)
Worlds’s leading range hood maker, Faber is currently selling silent range hood models with
Silentium ANC technology.
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Range Hood Example (Robam)
China’s leading range hood maker, Robam also announced they applied Silentium’s ANC
technology in their new Range Hood model.
22Robam 2018 New Product Press Conference, Shanghai, Sep.2017
Acoustic Rack Example
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▪ A Range of Soundproofed Rackmount cabinets with Active Noise Reduction & Active Heat Dissipation
▪ Up to 30 dB(A) server noise reduction
▪ Available in the following standard dimensions.
AcoustiRACKTM ACTIVE 15U usable (23U High)
AcoustiRACKTM ACTIVE 33U usable (41U High)
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Top 5 Innovative Companies in Israel
THANK YOU
www.silentium.com
For more information, please contact
Sang Hun Lee, Managing Director of [email protected]
