A technique for selectively configuring a case of a handheld device to shield an antenna from receiving or transmitting wireless signals is disclosed. The technique includes moving a blocking element on the case between a first position and a second position. The blocking element is a physical structure that is rotatable, slidable, or removable to switch between the first position and the second position. In response to moving the blocking element to the first position, the blocking element blocks wireless signals received or transmitted by the antenna of the handheld device. In response to moving the blocking element to the second position, wireless signals can be received or transmitted through the case by the antenna.

Technologies are generally described for a noise cancellation scheme for voice communications. In some examples, a system configured to cancel background noise in voice communication may include a user device configured to capture a background sound; and a server configured to receive the background sound captured by the user device, identify a source of the background sound from among a plurality of predetermined sound sources, and generate a reference background sound based at least in part on the identified source.

Technologies are generally described for a noise cancellation scheme for voice communications. In some examples, a system configured to cancel background noise in voice communication may include a user device configured to capture a background sound; and a server configured to receive the background sound captured by the user device, identify a source of the background sound from among a plurality of predetermined sound sources, and generate a reference background sound based at least in part on the identified source.

Disclosed are communications devices which can send indications that they are secure, and which can detect when a far end device is not secure (unsecure). A secure device is one that is not connected to a speakerphone or other speaker which is capable of emitting—or actually is emitting—sound which is louder than a certain threshold. If a communication device detects that a remote endpoint is unsecure, the communication device will switch to an unsecure mode. When the switch is made, the communications device alerts the user that the call is not secure so that the user can proceed accordingly.

Disclosed are a terminal and a terminal multiple protection method. The radiation processing module is configured to convert after preprocessing a first signal received from the external into a second signal that can be recognized by a baseband chip of a terminal. A radiation diagnosis module is configured to extract signal characteristics expressed by the second signal, to classify signals via comparison of signal characteristics, to diagnose to acquire a signal type to which the second signal pertains, and to output the second signal to a radiation protection control module for executing a relevant protection process for the corresponding signal type. The radiation protection module is configured to acquire the second signal and the corresponding signal type thereof and to selectively execute a relevant protection control process among multiple protection processes on the basis of the corresponding signal type.

Disclosed are a terminal and a terminal multiple protection method. The radiation processing module is configured to convert after preprocessing a first signal received from the external into a second signal that can be recognized by a baseband chip of a terminal. A radiation diagnosis module is configured to extract signal characteristics expressed by the second signal, to classify signals via comparison of signal characteristics, to diagnose to acquire a signal type to which the second signal pertains, and to output the second signal to a radiation protection control module for executing a relevant protection process for the corresponding signal type. The radiation protection module is configured to acquire the second signal and the corresponding signal type thereof and to selectively execute a relevant protection control process among multiple protection processes on the basis of the corresponding signal type.

Disclosed herein are method and device for processing received sound. The method includes receiving at least three sets of sound sent by at least three microphones of an apparatus; calculating a position of a sounding point in a three-dimensional space according to the at least three sets of sound; and adjusting a physical position of the apparatus according to the position of the sounding point in the three-dimensional space and an optimal sound receiving region of the apparatus, so as to approach or contain the position of the sounding point relative to the optimal sound receiving region of the apparatus. The physical position includes a spatial position and orientation of the apparatus. The embodiments can accurately determine the position of the sounding point, and then adjust state of the apparatus according to the position of the sounding point, to ensure the optimization of the sound reception effect.

Disclosed herein are method and device for processing received sound. The method includes receiving at least three sets of sound sent by at least three microphones of an apparatus; calculating a position of a sounding point in a three-dimensional space according to the at least three sets of sound; and adjusting a physical position of the apparatus according to the position of the sounding point in the three-dimensional space and an optimal sound receiving region of the apparatus, so as to approach or contain the position of the sounding point relative to the optimal sound receiving region of the apparatus. The physical position includes a spatial position and orientation of the apparatus. The embodiments can accurately determine the position of the sounding point, and then adjust state of the apparatus according to the position of the sounding point, to ensure the optimization of the sound reception effect.

A receiver control method includes: when a receiver of a terminal is at a first position of the terminal, picking up, by using a microphone, an audio signal sent by the receiver; and if there is a noise in the audio signal picked up by the microphone, moving the receiver to a second position of the terminal. When the receiver is at the first position, an orthographic projection of a first sound hole of the receiver along a first direction at least partially overlaps with a target component. When the receiver is at the second location, the orthographic projection of the first sound hole along the first direction does not overlap with the target component.

A receiver control method includes: when a receiver of a terminal is at a first position of the terminal, picking up, by using a microphone, an audio signal sent by the receiver; and if there is a noise in the audio signal picked up by the microphone, moving the receiver to a second position of the terminal. When the receiver is at the first position, an orthographic projection of a first sound hole of the receiver along a first direction at least partially overlaps with a target component. When the receiver is at the second location, the orthographic projection of the first sound hole along the first direction does not overlap with the target component.