Systems and methods are disclosed for reducing unwanted noise during image capture. The noise may be airborne or structure-borne. For example, airborne sound may be sound that is emitted from a motor of a motorized gimbal into the air, which is then detected by a microphone of an imaging device along with the desired sound. Structure-borne noise may include vibrations from the motor that reach the microphone. Structure-borne noise may lead to local acoustic pressure variation by the microphone or pure vibration of the microphone.

A noise emission reduction system includes a solenoid couplable to a shielding member, and to a frame of a vehicle. The solenoid is controllable to induce vibration of the shielding member in relation to the frame of the vehicle. A microphone is configured to receive sound emitted by a noise source. An accelerometer is couplable to the frame and a controller is coupled to the solenoid, to the microphone, and to the accelerometer. The controller is configured to: receive a first signal from the accelerometer; receive a second signal from the microphone; determine a control signal for the solenoid based on the first signal and the second signal; and control the solenoid using the determined control signal to induce vibration of the shielding member in relation to the frame.

The present subject matter relates to systems and methods for active vibration control system speed monitoring and control in which a speed protection monitor configured to receive index pulses as inputs to monitor the speed of one or more force generators. A rotary actuator control system can be connected in communication with the speed protection monitor and the one or more force generators, wherein the rotary actuator control system is configured to shut down or adjust the speed of the one or more force generators if the one or more force generators are determined to be operating at undesired speeds.

The invention relates to a laboratory mill comprising at least one counter-vibration device (27) which has at least one control unit (29a) for providing a counter-vibration signal (29b) and at least one controllable vibration generation unit (29) for converting the counter-vibration signal (29b) into counter-vibrations (30), wherein the vibration-generation unit (29) counteracts a device- and/or housing part (31) of the laboratory mill (1) and the counter-vibrations (30) lead to an active reduction in the vibrations of the device- and/or housing part (31) and/or an at least partial suppression of noise-inducing vibrations of the device- and/or housing part (31), by means of destructive interference.

A device for analyzing and compensating for automotive noise, vibration and harshness (NVH) is provided. The device includes a microprocessor, a sensor, to measure NVH associated with an automotive system of a vehicle at a frequency and monitor any direct correlation of an environmental condition to a harmonic or resonation problem, the sensor having an output in electrical communication with the microprocessor when vibrations are present at the measured frequency, and a tensioner for adjusting surface tension of a surface of the vehicle to reduce resonance, wherein the tensioner adjusts tension when said microprocessor determines resonance as sensed by the sensor.

A noise dampening arrangement for a motor vehicle includes a mass coupled to a structural component of the motor vehicle. A sensor detects vibration of the structural component of the motor vehicle, and transmits a vibration signal indicative of the detected vibration. An electronic processor is communicatively coupled to the sensor, receives the vibration signal, and emits a vibration compensation signal dependent upon the vibration signal. An actuator is communicatively coupled to the electronic processor, receives the vibration compensation signal, and exerts a force on the mass dependent upon the vibration compensation signal such that the vibration of the structural component of the motor vehicle is reduced.

A system including a rig site with at least one pollution control system located on the rig site. The pollution control system is configured to modify an output of light, noise, or vibrations from the rig site to an environment surrounding the rig site. Additionally, the pollution control system may include at least one active noise cancellation device, at least one active vibration cancellation device, and/or at least one active light control system to modify the light, noise, or vibrations.

A method for isolating vibrations from a source on a structure includes modeling the structure as a beam having a portion for isolation. A sensor is positioned proximate to the source, and at least one actuator is positioned on the structure between the source and the portion for isolation. A controller receives signals from the sensor and calculates vibrational inputs for each actuator that will isolate the structure portion. Driving signals are provided to each actuator by the controller in response to the calculated vibrational inputs, and each actuator is vibrated accordingly, isolating the structure portion from the source. This method can be implemented in multiple configurations to isolate the structure portion.

A system for actively attenuating acoustic vibrations of a rail for rail traffic is provided including at least one sensor for detecting at least a vertical acoustic vibration of the rail, at least one actuator for exciting at least a vertical counter-vibration of the rail and at least one control unit communicatively connected to the at least one sensor and the at least one actuator for controlling the at least one actuator depending on the vibration detected by the sensor, the counter-vibration being adapted to destructively interfere with the detected vibration, and the at least one actuator being mechanically coupled to the rail and to a carrier element supporting the rail. Also provided is a carrier element for the system and a method for actively attenuating acoustic vibrations of a rail for rail traffic.

The present disclosure provides a method for determining an arrangement of reference sensors for active road noise control (ARNC) in a vehicle with an automatic calibration system. The method includes mounting a plurality of vibrational sensors on a plurality of structure elements of the vehicle to generate a plurality of vibrational input signals and mounting at least one microphone inside a cabin of the vehicle to capture at least one acoustic input signal. The method further includes determining an arrangement of reference sensors from the plurality of vibrational sensors by determining a subset of vibrational sensors which sense the main mechanical inputs of road noise contributing to the at least one acoustic input signal.