A whole-vehicle-based method for evaluating extreme pressure and antiwear properties of grease includes injecting the grease onto a key bearing pin and causing the engineering machine to operate without load is disclosed. The method includes causing the engineering machine to operate under a load of 10% to 150% rated load at least once, viewing and analyzing a wear condition of a surface of the bearing pin, and issuing a whole-vehicle-based evaluation report of extreme pressure and antiwear properties of grease. The engineering machine is caused to operate once under a load of 10% to 150% rated load for 0.5 min to 100 h.

In-ear sound pressure level, SPL, is determined that is caused by output audio being converted into sound by a headset worn by a user. The in-ear SPL is converted into a sound sample having units that are suitable for evaluating sound noise exposure. These operations are repeated to produce a sequence of sound samples during playback. This sequence of sound samples is then written to a secure database. Access to the database is authorized by the user. Other aspects are also described and claimed.

In-ear sound pressure level, SPL, is determined that is caused by output audio being converted into sound by a headset worn by a user. The in-ear SPL is converted into a sound sample having units that are suitable for evaluating sound noise exposure. These operations are repeated to produce a sequence of sound samples during playback. This sequence of sound samples is then written to a secure database. Access to the database is authorized by the user. Other aspects are also described and claimed.

An earplug includes a tubular member configured to extend in one direction and to be capable of bending relative to the one direction, a first acoustic sensor configured to collect sound via the tubular member, and an earplug type sound insulation member in which the tubular member is inserted. The tubular member is preferably bendable according to a shape of an external auditory meatus. A housing having a first opening being communicated with the tubular member is preferably provided. The first acoustic sensor is preferably provided in the housing and collects sound via the tubular member and the first opening.

The system comprises: a remote control station; a plurality of detection devices for the detection of noise which are located inside an area to be monitored; a master device adapted to receive noise level data from the detection devices and adapted to send the data to the remote control station, the master device being provided with a client communication module configured to communicate with the remote control station and with an access point communication module configured to communicate with one of the detection devices; wherein each of the detection devices is provided with a client communication module configured to communicate with the access point communication module of the master device, the detection devices and the master device being located in predetermined positions and in a substantially homogeneous manner inside said area for the detection of noise level data which are certifiable and homogeneous both in terms of spatial distribution and in terms of time distribution.

A method for calculating real-time immission values at locations within an area of interest. The method comprises providing an emission dispersion model with real-time information on one or more mobile emitters, for example vehicles. The one or more mobile emitters are within an area of interest. The method further comprises providing the emission dispersion model with respective emission characteristics of the one or more mobile emitters. The method further comprises providing the emission dispersion model with information comprising influencing environmental factors on emission dispersion for an environment within the area of interest. The method further comprises calculating real-time immission values at locations within the area of interest based on the emission dispersion model. Further, a system for calculating real-time immission values at locations within an area of interest is provided.

A digital signal processing method for ambient sound acoustic dosimetry. Strength of a microphone signal generated by a watch worn by a user is determined and converted into a sound sample having units for sound noise exposure. This is repeated multiple times to produce a time sequence of sound samples that is written to a secure database access to which is authorized by the user. Other aspects are also described and claimed.

A digital signal processing method for ambient sound acoustic dosimetry. Strength of a microphone signal generated by a watch worn by a user is determined and converted into a sound sample having units for sound noise exposure. This is repeated multiple times to produce a time sequence of sound samples that is written to a secure database access to which is authorized by the user. Other aspects are also described and claimed.

A monitoring system can include an earpiece, a database with stored earpiece characteristics data, and a microphone to receive a plurality of signals where each signal of the plurality of signals can represents a respective sound pressure level of sound pressure values over a time duration. The system can also include a processor and a memory coupled processor, the memory having computer instructions which when executed by the processor causes the processor to perform the operations. The operations can include determining exposure time duration when a signal of the plurality of signals exceeds a sound pressure level threshold value, retrieving a subset of data of the stored earpiece characteristics data, and modifying an acoustic output of the earpiece in accordance with the subset of data of the stored earpiece characteristics data.

A monitoring system can include an earpiece, a database with stored earpiece characteristics data, and a microphone to receive a plurality of signals where each signal of the plurality of signals can represents a respective sound pressure level of sound pressure values over a time duration. The system can also include a processor and a memory coupled processor, the memory having computer instructions which when executed by the processor causes the processor to perform the operations. The operations can include determining exposure time duration when a signal of the plurality of signals exceeds a sound pressure level threshold value, retrieving a subset of data of the stored earpiece characteristics data, and modifying an acoustic output of the earpiece in accordance with the subset of data of the stored earpiece characteristics data.