38results about How to "Avoid sound quality degradation" patented technology

A microphone with narrow directivity capable of obtaining high directivity and reducing wind noise is obtained. A cylindrical acoustic tube, a microphone unit arranged in the acoustic tube, a front acoustic chamber and a rear acoustic chamber formed by partitioning the acoustic tube by the microphone unit, a front acoustic terminal for causing the front acoustic chamber to communicate with an external space, a rear acoustic terminal for causing the rear acoustic chamber to communicate with an external space, and a film that covers the front acoustic terminal are comprised. It is recommended that the rear acoustic terminal be also covered with a film. Further, it is recommended that the films be made of vinyl chloride and formed into a corrugated shape.

A portable wireless terminal has a hinge section provided type antenna suitable for a clamshell type which can maintain spacing from a head of a human body and alleviate influence of a hand of a user. The clamshell type portable wireless terminal having an upper housing (10) and a lower housing (20) connected to each other through a hinge has a projection section (30) projecting outward near a hinge section of the lower housing (20). In addition, a built-in antenna is housed in the projection section (30). The built-in antenna has an antenna element (50) in a linear or plate shape. At least a part of the antenna element on an open end side is disposed at a position which is hardly to be covered by the hand or finger of the user when the user uses the terminal.

The invention relates to the technical field of sound boxes, in particular to a method for manufacturing a sound box net cover, a sound box net cover and a sound box. The manufacturing method of the speaker net cover is as follows: at least setting mist glue in the area of ​​the sound outlet on the front of the bracket and bonding the mesh cloth to the area of ​​the sound outlet. The mist glue will not block the sound hole, thereby avoiding the impact on the sound quality. Further, the mist glue makes the mesh and the bracket stick together at least at the sound hole area, and the mesh cloth will not hit the sound hole area even if it is loose, and thus will not vibrate, thus solving the problem caused by the mesh. The problem of abnormal sound caused by the impact of the cloth and the bracket. The speaker net cover is made by the manufacturing method of the above speaker net cover, and the speaker includes the above speaker net cover. The above-mentioned speaker net cover and speaker will not cause abnormal sound due to loose mesh hitting the bracket after being used for a certain period of time, and the sound quality will not be reduced due to loose mesh.

A speaker applicable to various electronic devices includes a speaker body including a magnet and a diaphragm having a voice coil interacting with the magnet, the magnet and the diaphragm being sequentially received therein; at least one main hole defined through a rear surface of the speaker where a speaker sound is not output, such that air generated in the speaker according to vibration of the diaphragm is discharged therethrough; and at least one auxiliary air hole defined through a predetermined location of a side surface of the body to communicate with an inside of the body, such that air within the speaker is additionally discharged therethrough.

An apparatus for processing an audio signal and method thereof applied to an audio playback system are disclosed. The apparatus comprises a decoder, an error-correcting circuit and an audio correcting module. The method for processing audio signals in accordance with the present invention decodes the audio signal to generate a decoded signal by the decoder. Then, the error-correcting circuit performs an error-correcting algorithm in the decoded signal to generate an error indication signal and an output audio signal. And the audio correcting module corrects the output audio signal to generate a corrected audio signal when the error indication signal indicates that the output audio signal has error.

A mobile terminal having an MFD comprises a signal processor that outputs an analog signal and a control signal; a filter module in communication with the signal processor to output a filtered signal and an unfiltered signal; and a switch in communication with the filter module and responsive to the control signal to output the filtered signal to the MFD when the control signal is at a first level, and to output the unfiltered signal when the control signal is at a second level.

Digital audio data with error detection bits added thereto is inputted to an error detecting and correcting device (4). The correcting device (4) corrects an error when the error is detected in the digital audio data. The digital audio data outputted from the error detecting and correcting device (4) is inputted to an impulse noise suppressing circuit (6). The suppressing circuit (6) operates for a predetermined time period when the correcting device (4) detects an error.

In order to avoid deterioration in sound quality caused by band shortage between an HNB-GW and an HNB, in a femto system 100, an HNB-GW 140 is connected to an HNB 120 via a network 130, and relays at least one of transmission and reception of voice data between an MGW 170 and the HNB 120. A narrow band determination unit 150 in the HNB-GW 140 determines whether the band of the network 130 is a narrow band which is equal to or lower than a predetermined threshold. When it is determined that the band is a narrow band by the narrow band determination unit 150, a conversion unit 160 converts the voice data to decrease a bit rate of the voice data transferred to the HNB 120 from the MGW 170.

The invention relates to the technical field of sound equipment, in particular to a wall-mounted sound equipment which comprises a fixing mechanism, a protection device and a sound equipment mounting mechanism. The fixing mechanism comprises a driving mechanism and a moving mechanism; the driving mechanism comprises a fixed plate, a driving motor is mounted at the front end of the fixed plate, one side of the fixed plate is connected with a mounting plate, a sliding groove is formed in the front end of the mounting plate, a driving plate is connected to the upper end of the mounting plate, a rotating shaft is arranged in the driving plate, a second limiting plate is arranged at the position, close to the driving plate, of the outer side of the rotating shaft, and a first limiting plate is mounted on the other side of the second limiting plate on the outer side of the rotating shaft; the moving mechanism comprises a connecting plate, a mounting groove is formed in the position, close to the upper portion, of the front end of the connecting plate, and a sliding block is installed at the rear end of the connecting plate. According to the wall-mounted sound box, the sound box can be moved to facilitate use and disassembly of the sound box, and when the sound box is not used, the sound box is protected, and the sound box is prevented from being damaged.

In order to avoid deterioration in sound quality caused by band shortage between an HNB-GW and an HNB, in a femto system 100, an HNB-GW 140 is connected to an HNB 120 via a network 130, and relays at least one of transmission and reception of voice data between an MGW 170 and the HNB 120. A narrow band determination unit 150 in the HNB-GW 140 determines whether the band of the network 130 is a narrow band which is equal to or lower than a predetermined threshold. When it is determined that the band is a narrow band by the narrow band determination unit 150, a conversion unit 160 converts the voice data to decrease a bit rate of the voice data transferred to the HNB 120 from the MGW 170.

An audio signal interpolation device comprises a spectral movement calculation unit which determines a spectral movement which is indicative of a difference in each of spectral components between a frequency spectrum of a current frame of an input audio signal and a frequency spectrum of a previous frame of the input audio signal stored in a spectrum storing unit. An interpolation band determination unit determines a frequency band to be interpolated by using the frequency spectrum of the current frame and the spectral movement. A spectrum interpolation unit performs interpolation of spectral components in the frequency band for the current frame by using either the frequency spectrum of the current frame or the frequency spectrum of the previous frame.

The invention is related to supporting structure of loudspeaker connected to side of image display device such as TV set. The image display device includes front chassis, back chassis, and loudspeakers. Through multiple connection holes, loud speakers are installed on two sides of the front chassis. Supporting structure of loudspeaker includes: being setup inside of the said front chassis, fixed pins are located at stated length extended behind corresponding connection holes on the loud speakers; through joint groove, shockproof cover is pressed in insertion holes on the segmented grooves, where there are holes larger than corresponding connection holes on loudspeakers.

An inter-channel correlation calculation unit (102) calculates an inter-channel correlation between a left channel and a right channel by using a left channel signal and a right channel signal that constitute a stereo signal. A DMA stereo encoding unit (104) and a DM stereo encoding unit (105) encode the left channel signal and the right channel signal by using a common coding mode if the inter-channel correlation is greater than a threshold value and individually encode the left channel signal and the right channel signal by using a coding mode determined for each of the left channel signal and the right channel signal if the inter-channel correlation is less than or equal to the threshold value.

In an encoder (100), a signal analysis unit (101) performs signal analysis on an L channel signal and an R channel signal that constitute a stereo signal and generates a parameter used to determine a coding mode for each of an L channel and an R channel. A DMA stereo encoding unit (104) encodes the L channel signal and the R channel signal by using a coding mode common to the L channel signal and the R channel signal. At this time, the DMA stereo encoding unit (104) determines the common coding mode by selecting, out of the L channel and the R channel, the one that has a lower ratio of energy of an environmental sound component to the entire energy of the channel and using the parameter of the selected channel.

The present disclosure provides a communication system. The communication system includes a radio wave receiver; a transmission node that transmits data; and a reception node that receives the data from the transmission node. The transmission node changes a transmission rate of the data so that a notch point at which a spectrum of a communication waveform decreases overlaps with a frequency selected by the radio wave receiver.

The invention discloses a sound display rack which comprises bases, a lifting unit and a moving unit. The two bases correspond to each other left and right. The lifting unit comprises supporting rods,elastic bolts, sliding blocks, a mounting rod and positioning holes. The two supporting rods are arranged in the middles of the top ends of the two bases correspondingly. The elastic bolts are arrayed on the outer side faces of the two supporting rods. The sliding blocks are arranged at the left end and the right end of the mounting rod. Sliding holes in the side faces of the sliding blocks are slidably connected with the supporting rods. The positioning holes are formed in the outer side surfaces of the sliding blocks, and the positioning holes are matched with the elastic bolts. Insertion holes are formed in the front side face of the mounting rod in an array mode. The moving unit is arranged on the outer side of the mounting rod. The height of a sound box can be adjusted through the lifting unit according to the distance conditions of different users, the users can feel the difference of different tones, and the sound display rack is easy to use, firm in fixation, convenient to adjust and high in practicability.

A noise-cancelling headphone is provided that avoids an influence of the wind and prevents degradation in the sound quality of the reproduced sound output from a driver unit. The noise-cancelling headphone includes an ear piece including a housing unit having an interior and an exterior, a driver unit attached to the housing unit, and a microphone collecting external sounds at the exterior of the housing unit. The housing unit includes an accommodating portion accommodating the microphone and a sound collecting hole establishing the communication between the accommodating portion and the exterior of the housing unit. The accommodating portion is disposed in an upper portion of the housing unit of the noise-cancelling headphone when worn by the user. The sound collecting hole is open toward the upper side of the housing unit of the noise-cancelling headphone when worn by the user.

The invention discloses a headphone storage device. The headphone storage device comprises sensing elements, a detection module and a processing module; the sensing elements contact with the outer surfaces of ear covers to determine the detection regions of the outer surfaces of the ear covers; the ear covers cover headphone shells; the detection module is used for acquiring the resistance parameters of the sensing elements or the impedance parameters of the detection regions; and the processing module is used for generating the water content of the detection regions according to the resistance parameters or the impedance parameters. The invention further provides a headphone and a method for detecting the water content of a headphone. With the headphone storage device of the invention adopted, on the one hand, the headphone can be stored, and on the other hand, the water content of the headphone, especially the ear covers can be detected in real time when necessary, and therefore, a seller or a consumer can know the production, storage, transportation and use states of the headphone in real time; and when the water content of the ear covers is high, environmental parameters or useconditions can be timely improved, and therefore, the problem that the headphone is mildewed or the tone quality of the headphone is reduced due to damp is avoided.

An audio signal interpolation device comprises a spectral movement calculation unit which determines a spectral movement which is indicative of a difference in each of spectral components between a frequency spectrum of a current frame of an input audio signal and a frequency spectrum of a previous frame of the input audio signal stored in a spectrum storing unit. An interpolation band determination unit determines a frequency band to be interpolated by using the frequency spectrum of the current frame and the spectral movement. A spectrum interpolation unit performs interpolation of spectral components in the frequency band for the current frame by using either the frequency spectrum of the current frame or the frequency spectrum of the previous frame.

A mobile terminal having an MFD comprises a signal processor that outputs an analog signal and a control signal; a filter module in communication with the signal processor to output a filtered signal and an unfiltered signal; and a switch in communication with the filter module and responsive to the control signal to output the filtered signal to the MFD when the control signal is at a first level, and to output the unfiltered signal when the control signal is at a second level.

A speaker applicable to various electronic devices includes a speaker body including a magnet and a diaphragm having a voice coil interacting with the magnet, the magnet and the diaphragm being sequentially received therein; at least one main hole defined through a rear surface of the speaker where a speaker sound is not output, such that air generated in the speaker according to vibration of the diaphragm is discharged therethrough; and at least one auxiliary air hole defined through a predetermined location of a side surface of the body to communicate with an inside of the body, such that air within the speaker is additionally discharged therethrough.

The invention discloses an angle adjusting mechanism and a loudspeaker box having the angle adjusting mechanism, wherein the loudspeaker box having the angle adjusting mechanism includes an angle adjusting positioning mechanism, and a bottom cover. The angle adjusting mechanism includes a housing, a support rod sleeve, a support rod, a limiting mechanism, and an angle positioning mechanism, wherein the limiting mechanism includes a stop structure and a rotating structure; the angle positioning mechanism includes at least one snap-fit structure disposed on the sidewall, and at least one abutting structure; the snap-fit structure includes a plurality of trapezoidal slots, and the abutting structure includes at least one positioning strip; the positioning strip includes a trapezoidal table; and the trapezoidal table is inserted into one of the plurality of trapezoidal slots when the support rod is inserted into the support rod sleeve to position the relative position of the support rod sleeve and the housing. Since the angle adjusting mechanism has the angle positioning mechanism and the limiting mechanism, the loudspeaker box may rotate around the pivot of the housing to adjust the angle of the sound under the mutual cooperation of the housing, the support rod sleeve and the support rod.

A caption MP3 player having a caption display function of displaying caption information in synchronism with corresponding audio information when the audio information is outputted on stereo, a caption MP3 data format and a method of reproducing the caption MP3 data are provided. The caption MP3 player includes a storage section to which the audio information and the corresponding caption information are inputted and stored therein, a signal separation section for separating the audio information and the caption information provided from the storage section, a control section for controlling storage and output of the information through the storage section and controlling the audio and caption information separated by the signal separation section to be synchronized with each other, and a caption output section for outputting the caption information synchronized with the audio information that corresponds to the caption information and is outputted from the audio output section.

In an encoder, a signal analysis unit performs signal analysis on an L channel signal and an R channel signal that constitute a stereo signal and generates a parameter used to determine a coding mode for each of an L channel and an R channel. A DMA stereo encoding unit encodes the L channel signal and the R channel signal by using a coding mode common to the L channel signal and the R channel signal. At this time, the DMA stereo encoding unit determines the common coding mode by selecting, out of the L channel and the R channel, the one that has a lower ratio of energy of an environmental sound component to the entire energy of the channel and using the parameter of the selected channel.