A smart hearing protection (SHP) device operatively connected to a human ear is disclosed. An internal sensor disposed on an inner side of the SHP device is configured to measure sound pressure level exposure of the human ear. An external sensor disposed on an outer side of the SHP device is configured to measure a sound pressure level external to the SHP device. The SHP includes a wireless transmitter operatively connected to both the internal and external sensors for transmitting data to a smart hearing software application for storing sensor data and monitoring sound pressure levels in connection with occupational safety and health.

Systems and method for synchrophasing aircraft engines are disclosed. One method comprises receiving data indicative of a sensed vibration level associated with a first aircraft engine and a second aircraft engine operating at a substantially same operating speed and commanding one or more momentary changes in operating speed of the second aircraft engine until the sensed vibration level substantially reaches a target vibration level. The momentary changes in operating speed of the second aircraft engine is commanded irrespective of phase information associated with imbalances of the first and second aircraft engines.

Systems and method for synchrophasing aircraft engines are disclosed. One method comprises receiving data indicative of a sensed vibration level associated with a first aircraft engine and a second aircraft engine operating at a substantially same operating speed and commanding one or more momentary changes in operating speed of the second aircraft engine until the sensed vibration level substantially reaches a target vibration level. The momentary changes in operating speed of the second aircraft engine is commanded irrespective of phase information associated with imbalances of the first and second aircraft engines.

An example method includes determining, by a flight planning system, a perceived noise at a surface location based on acoustic noise emitted by an aerial vehicle at an aerial location. The aerial location corresponds to a waypoint along a proposed trajectory. Further, determining the perceived noise includes estimating propagation of the acoustic noise from the aerial location to the surface location based on environmental features of the environment or weather data. The flight planning method also includes determining, by the flight planning system using a noise-abatement function, a noise-abatement value of the proposed trajectory for the aerial vehicle based on the perceived noise at the surface location. In addition, the flight planning method includes determining, by the flight planning system, a flight plan for the aerial vehicle based on the noise-abatement value of the proposed trajectory, and outputting the flight plan for use in navigating the aerial vehicle.

An example method includes determining, by a flight planning system, a perceived noise at a surface location based on acoustic noise emitted by an aerial vehicle at an aerial location. The aerial location corresponds to a waypoint along a proposed trajectory. Further, determining the perceived noise includes estimating propagation of the acoustic noise from the aerial location to the surface location based on environmental features of the environment or weather data. The flight planning method also includes determining, by the flight planning system using a noise-abatement function, a noise-abatement value of the proposed trajectory for the aerial vehicle based on the perceived noise at the surface location. In addition, the flight planning method includes determining, by the flight planning system, a flight plan for the aerial vehicle based on the noise-abatement value of the proposed trajectory, and outputting the flight plan for use in navigating the aerial vehicle.

A control method of an apparatus according to an aspect of the present disclosure includes acquiring first vibration data that indicates a vibration of the apparatus produced by a speaker outputting a sound. Then the control method includes storing the acquired first vibration data in a memory. Further, the control method includes acquiring second vibration data that is generated by a vibration sensor detecting a vibration including a vibration based upon a body movement of a user on bedding on which the apparatus is placed. And the control method includes generating amended data by amending the acquired second vibration data using the first vibration data stored in the memory.

A control method of an apparatus according to an aspect of the present disclosure includes acquiring first vibration data that indicates a vibration of the apparatus produced by a speaker outputting a sound. Then the control method includes storing the acquired first vibration data in a memory. Further, the control method includes acquiring second vibration data that is generated by a vibration sensor detecting a vibration including a vibration based upon a body movement of a user on bedding on which the apparatus is placed. And the control method includes generating amended data by amending the acquired second vibration data using the first vibration data stored in the memory.

The present invention proposes a system for continuous monitoring of dynamic equipment condition through the use of vibration, temperature and/or acoustic noise sensor modules associated with wireless technology (wireless) or LTE (Long Term Evolution). The system is characterized by having vibration, temperature and/or acoustic noise sensor modules. The sensor modules of the system also have the functionality to measure the sound signature of the machines.

The present invention proposes a system for continuous monitoring of dynamic equipment condition through the use of vibration, temperature and/or acoustic noise sensor modules associated with wireless technology (wireless) or LTE (Long Term Evolution). The system is characterized by having vibration, temperature and/or acoustic noise sensor modules. The sensor modules of the system also have the functionality to measure the sound signature of the machines.

An apparatus, device, or method may detect or track aim direction or motion of a firearm and display information indicative of such aim direction or motion. Sequence of bullet strikes on a real or virtual target by multiple gunshots may be determined. A method may comprise detecting one or more gunshots of the firearm discharging live ammunition, measuring or determining aim directions or motions of the firearm before, during, and/or after the one or more gunshots, recording these measurements or determinations, and generating output for displaying images on a display.