Active ear muffs are available with electronic noise cancellation that can reduce direct path ear canal noise by approximately 17 – 33 dB, depending on the low, medium, or high frequency at which attenuation is measured.

Active systems are designed for three dimensional noise cancellation.

* Active Noise Reduction, more commonly Active noise control

# REDIRECT Active noise control

# REDIRECT Active noise control

Active noise control is sound reduction that utilizes a power source.

Active noise canceling is best suited for low frequencies.

Active mixers improve isolation between the ports, but may have higher noise and more power consumption ; an active mixer can be less tolerant of overload.

# REDIRECT Active noise control

# Signal Attenuation by Active Devices: Devices such as relays, transistors, and rectifiers create noise in their respective systems, increasing the likelihood of signal degradation.

To minimize exhaust noise intrusion into the passenger compartment from the engine at low rpms, " Active Noise Control " has been installed.

* Active noise control in both cabs

* Active noise control

* Active noise control or ( Active noise cancellation ), a noise-reduction technique

# REDIRECT Active noise control

# REDIRECT Active noise control

Active Oberon is yet another variant of Oberon, which adds objects ( with object-centered access protection and local activity control ), system-guarded assertions, preemptive priority scheduling and a slightly changed syntax for methods ( aka type-bound procedures in the Oberon world ).

Active thermal control makes use of electrical heaters and certain actuators such as louvers to control temperature ranges of equipments within specific ranges.

State Active Duty is based on State statute and policy as well as State funds, and the Soldiers and Airmen remain under the command and control of the Governor.

Active feedback control of MHD instabilities should allow operation

Active region is encoded using Transition Minimized Differential Signaling scheme, where the control region is encoded with a fixed 2b / 10b encoding.

These videos detail the Active Aeroelastic Wing two-phase NASA-Air Force flight research program to investigate the potential of aerodynamically twisting flexible wings to improve maneuverability of high-performance aircraft at transonic and supersonic speeds, with traditional control surfaces such as ailerons and leading-edge flaps used to induce the twist.

Active learning occurs when a person takes control of their learning experience.

* Active Traffic Management system opens up UK motorway hard shoulder as an extra traffic lane, it uses CCTV and VMS to control and monitor the traffic's use of the extra lane

* Active Stability Control, a term used by Mitsubishi to refer to their electronic stability control system

* Active vibration control

Active control of plasma modes is also possible with this system.

* Active clearance control, an engine temperature control

With the creation of Second Life and Active Worlds before it, people have even more control over this virtual world, a world where anything that a participant can think of can become a reality.

Active and / or passive pest control is also greatly useful against non-native House Sparrows -- these are small enough to enter bluebird boxes and kill bluebirds, and destroy nests.

On 16 July 1993, the Governor of Illinois ordered 270 members of the 126th Air Refueling Wing to State Active Duty to support the Illinois National Guard's flood control mission during the Great Flood of 1993.

* Active vibration control

Both direct and remote distributorless systems also allow finer levels of ignition control by the engine computer, which helps to increase power output, decrease fuel consumption and emissions, and implement features such as Active Fuel Management.

Bose Active Noise Cancellation ( ANC ) rounded out the suite.

Vehicles equipped with VCM also include Active Noise Cancellation ( ANC ) and Honda's Active Control Engine Mount ( ACM ) system.

Active double bass ensembles include L ' Orchestre de Contrebasses ( 6 members ), Bass Instinct ( 6 members ), Bassiona Amorosa ( 6 members ), the Chicago Bass Ensemble ( 4 + members ), The Bass Gang ( 4 members ), the London Double Bass Ensemble ( 6 members ) founded by members of the Philharmonia Orchestra of London who produced the LP Music Interludes by London Double Bass Ensemble on Bruton Music records, Brno Double Bass Orchestra ( 14 members ) founded by the double bass professor at Janáček Academy of Music and Performing Arts and principal double bass player at Brno Philharmonic Orchestra-Miloslav Jelinek, and the ensembles of Ball State University ( 12 members ), Shenandoah Conservatory, and the Hartt School of Music.

Active SETI, also known as messaging to extraterrestrial intelligence ( METI ), consists of sending signals into space in the hope that they will be picked up by an alien intelligence.

Many generic web servers also support server-side scripting using Active Server Pages ( ASP ), PHP, or other scripting languages.

There are a wide range of software systems, such as CGI, Java Servlets and Java Server Pages ( JSP ), PHP, Perl, Python, and Ruby programming languages, Active Server Pages and ColdFusion ( CFML ) that are available to generate dynamic web systems and dynamic sites.

The Windows 2000 Server family has additional features, including the ability to provide Active Directory services ( a hierarchical framework of resources ), Distributed File System ( a file system that supports sharing of files ) and fault-redundant storage volumes.

Certain new features are common across all editions of Windows 2000, among them NTFS 3. 0, the Microsoft Management Console ( MMC ), UDF support, the Encrypting File System ( EFS ), Logical Disk Manager, Image Color Management 2. 0, support for PostScript 3-based printers, OpenType < tt >(. OTF )</ tt > and Type 1 PostScript < tt >(. PFB )</ tt > font support, the Data protection API ( DPAPI ), an LDAP / Active Directory-enabled Address Book, usability enhancements and multi-language and locale support.

It is the first Windows NT release to include Active Desktop, first introduced as a part of Internet Explorer 4. 0 ( specifically Windows Desktop Update ), and only pre-installed in Windows 98 by that time .< ref name =" ActiveDesktop ">

The first stage of boot loaders located on fixed disks and removable drives must fit into the first 446 bytes of the Master Boot Record in order to leave room for the default 64-byte partition table with four partition entries and the two-byte boot signature, which the BIOS requires for a proper boot loader — or even less, when additional features like more than four partition entries ( up to 16 with 16 bytes each ), a disk signature ( 6 bytes ), a disk timestamp ( 6 bytes ), an Advanced Active Partition ( 18 bytes ) or special multi-boot loaders If an active partition is found, the MBR code loads the boot sector code from that partition, known as Volume Boot Record ( VBR ), and executes it.

Active research traditions related to the unconscious include implicit memory ( see priming, implicit attitudes ), and nonconscious acquisition of knowledge ( see Lewicki, see also the section on cognitive perspective, below ).

Research forerunners of today's location-based services are the infrared Active Badge system ( 1989 – 1993 ), The Ericsson-Europolitan GSM LBS trial ran during 1995 by Jörgen Johansson and the master thesis written by Nokia employee Timo Rantalainen, in 1994.

The downside to Active Solar systems is that the external power sources can fail ( probably rendering them useless ), and the controls need maintenance.

Headed by Arnaud Lagardère, the firm does business in around 30 countries and is structured around four main business lines: its book and electronic publishing division ( Lagardère Publishing ) includes the major imprint Hachette Livre ; while the Lagardère Active unit encompasses newspaper, digital media and magazine publishing ( including Hachette Filipacchi Médias ), radio and television broadcasting and production and advertising sales.

1 AF primarily consists of Active Guard and Reserve ( AGR ) and Air Reserve Technician ( ART ) personnel of the Air National Guard ( ANG ), augmented by additional part-time " traditional " Air National Guard and Air Force Reserve personnel.

* KRDJ ( FM ), Rock 93. 7, Active Rock