809 results about "Pickup" patented technology

An ear terminal includes a sealing section arranged for use in the ear meatus of a human, with an inner microphone having a sound inlet for being directed into the meatus and an electronic unit including filtering elements coupled to the inner microphone for filtering the signal from the inner microphone, the filtering elements being programmable to transform the signals based on the sounds received in the ear by the inner microphone into sounds having essentially the characteristics of spoken sounds of the wearer of the ear terminal.

The invention discloses a sleepy obstacle measuring device and method of limitless and non-awareness, which is characterized by the following: setting the pickup and microprocessor in the pillow; placing the microphone on two sides of pillow toward the detector mouth and nose to receive the sound in the phonetic interface of microprocessor; transmitting the magnified sound signal through microphone to the microprocessor; proceeding sound signal filter and intelligent judgment of limitless and non-awareness sleepy obstacle measurement; judging the sleep respiratory and sleep respiratory hesitation symptom; sending the judgment result to the specialist through interface to treat and improve the sleepy obstacle.

The invention relates to a signal processing method for enhancing target voice signal pickup in a sound environment. The method includes the steps that (1), parameters of an ESN are acquired through experiments, and a corresponding sound source model is established; (2), the model is used for two occasions, namely, when output of the model is certain expected target voice signals and input of the model is a mixture of sound environment reflected sound signals of a target voice source and the target voice signals, the model can be used for echo cancellation of field amplified sound; when the output of the model is the expected target voice signals and the input of the model is a mixture of sound environment reflected sound signals of another specific voice source and the target voice signals, the model can be used for echo cancellation of voice communication between two specific persons; (3), when the model is used by a target voice person in the actual sound environment and the pickup position changes, reflected signals of sound source signals pointed by training can be suppressed as well, and then corresponding enhanced target voice signals are output. By the adoption of the signal processing method, the influence of the change of the pickup position on quality of the voice signals is overcome.

An electromagnetic pickup for a musical instrument, has two coils (2, 3) with pole pieces (4-8, 9-13) in their core regions and a connection that connects the two coils together, out of phase, in series or in parallel, so that they cancel each others extraneous noise and hum. To accomplish a noise-free pickup with the clarity and dynamics of a single coil pickup, and a uniform output level throughout its longitudinal axis, the coils are partly overlapping each other, the pole pieces in the core region of the first coil are partly overlapping with the pole pieces in the core region of the second coil, and the coils (2, 3) with the pole pieces (6-8, 1-13) induce the same voltage in the overlapping area (14) as the voltage induced by the coils and the pole pieces in their core regions outside the overlapping area (14).

Signals are received from audio pickup channels that contain signals from multiple sound sources. The audio pickup channels may include one or more microphones and one or more accelerometers. Signals representative of multiple sound sources are generated using a blind source separation algorithm. It is then determined which of those signals is deemed to be a voice signal and which is deemed to be a noise signal. The output noise signal may be scaled to match a level of the output voice signal, and a clean speech signal is generated based on the output voice signal and the scaled noise signal. Other aspects are described.

An electromagnetic pickup adapted to be secured to a stringed musical instrument, such as a guitar or bass or the like, of the type having a plurality of magnetic strings of ferromagnetic composition such as steel tensioned to provide musical notes under mechanical stimulation such as picking is disclosed. The electromagnetic pickup comprises at least one magnetized core having a length and a width. An electrically conductive material is wound into at least one coil around the magnetized core, and a ferromagnetic material such as iron, nickel, cobalt or alloys thereof is positioned on at least one side of the length and internally of at least a portion of the electrically conductive material. The electromagnetic pickup is mounted proximate the strings in such a manner that magnetic field of the pickup extends to the strings for the purpose of generating an output electrical signal analogous to the musical notes.

Musical instrument pickups comprising a plurality of coil-wire wrappings, each coil-wire wrapping having a particular geometric cross-section. Related embodiments exhibiting noise cancellation features are also disclosed.

The invention discloses a distributed microphone pickup system and method in a complex scene, and the method comprises the steps: carrying out the array layout of a plurality of microphones through adistributed structure, and picking up the voice information in an application scene; the picked voice signals are processed through audio algorithms such as noise reduction, echo cancellation and reverberation removal, so that the pickup effect is improved, and smooth and clean voice signals can be obtained; and finally, outputting the processed voice signal to control the equipment to execute corresponding operation.

An electric-acoustic stringed instrument has a removable, adjustable and acoustic artwork top with a decorative bridge and tailpiece; a mounting system for electric string vibration pickups that allows five degrees of freedom in placement and orientation of each pickup anyplace between the neck and bridge; a pickup switching system that provides K*(K−1)/2 series-connected and K*(K−1)/2 parallel-connected humbucking circuits for K matched single-coil pickups; and an on-board preamplifier and distortion circuit, running for over 100 hours on two AA cells, that provides control over second- and third-harmonic distortion. The switched pickups, and up to M=12 switched tone capacitors provide up to M*K*(K−1) tonal options, plus a linear combination of linear, near second-harmonic and near-third harmonic signals, preamp settings, and possible additional vibration sensors in or on the acoustic top.

The invention provides a synchronous mutual-assistance classroom teaching system comprisi a main classroom unit and two remote classroom units. The main classroom unit arranged in a high-quality recoding and broadcasting teaching room has an interactive terminal. The two remote classroom units are provided with normalized recording and broadcasting systems and are equipped with interactive terminals, high-definition cameras, pickup units, audio processors, all-in-one units, and loudspeakers and the like. The omnidirectional pickup units pick up sounds in all directions and the collected soundsare processed by the audio processors in a high-quality manner. A cloud recoding and broadcasting platform carried out operation by means of network school connection. With interactive teaching and paired assistance, good-quality resource sharing is realized and an objective of education balancing is achieved. Therefore, the children in low-quality schools can share the high-quality education resources. During the process of interactive teaching, main teachers and assisted teachers prepare lessons jointly and teaching reflection and teaching evaluation are carried out, so that the professional development of teachers is realized and the collection of high-quality education resources is realized.

Improved pickups for stringed instruments, such as guitars, ukuleles, banjos and the like. The pickup system includes a housing with a transducer element and a first magnetic means, and a distinct second magnetic means that cooperates with the first magnetic means to grasp a part of the instrument there between and thereby releasably mount the pickup on the instrument. Thus the pickup system can be easily mounted, removed or moved to other locations on the stringed instrument to produce the most desirable effect.

An electromagnetic field pickup (10) for a musical instrument including an electromagnetic signal generator (12), an electromagnetic field transducer (18), a mixer (28), the electromagnetic signal generator (12), the electromagnetic field transducer (18) and the mixer (28) are respectively connected in series, the electromagnetic signal generator (12) is also connected directly to the mixer (28), so constructed and arranged that when power is supplied to the electromagnetic field pickup (10) an audio electrical signal of substantially same pitch, intonation and sustain as a vibrating element (22) of the instrument is generated.

The magnetic pickup response measurement and presentation system quickly measures frequency responses of magnetic pickups under various loading conditions, and the data is presented graphically and aurally to the user to aid user comparison and selection of magnetic pickups for use in musical instruments.

The invention provides an automatic switching system for realizing active noise cancellation and sound-outside-earphone pickup. The automatic switching system comprises a feedforward microphone, a first AD converter, a first low-delay filter, a feedforward filter, a sound-outside-earphone pickup filter and a voice activity detecting unit, wherein the feedforward microphone is arranged on the outerside of an earphone, and is used for acquiring ambient sounds outside the earphone; the first AD converter, the first low-delay filter and the feedforward filter are sequentially connected with the feedforward microphone; the sound-outside-earphone pickup filter is connected with the first low-delay filter, and is used for picking up sounds outside the earphone; and the voice activity detecting unit is used for detecting acquired ambient sound signals, and transmitting a switching command to control the switching of the feedforward filter and the sound-outside-earphone pickup filter. The automatic switching system automatically detects the external ambient sounds, switches active noise cancellation and sound-outside-earphone pickup according to the external ambient sounds, can adapt to different scenes effectively, and enhances the user experience.

The invention is suitable for the field of noise reduction and provides an adaptive noise reduction method based on audio feature extraction. The method comprises the following steps: A, collecting sound through a pickup; B, carrying out segmented analysis and processing of the collected sound according to a frequency range; C, comparing the processed sound with a preset frequency range and determining whether the sound is within the preset range, going on to execute the next step if the sound is within the preset range, otherwise, carrying out denoising processing; D, determining whether the sound within the preset frequency range is bigger than a preset value a of a physical sample, executing the next step if the sound is bigger than the preset value a, or determining that the sound is sound of human talk if the sound is smaller than the preset value a; E, determining whether the sound within the preset frequency range is bigger than an acoustic feature preset value b, executing the next step if the sound is bigger than the preset value b, or determining that the sound is sound of human talk if the sound is smaller than the preset value b; and F, determining whether the sound within the preset frequency range is bigger than a semantic feature preset value c, determining that the kept sound is sound of music if the sound is bigger than the preset value c, or determining that the sound is sound of human talk if the sound is smaller than the preset value c.

Method, apparatus, and computer-readable media to manage undesired sound sources in microphone pickup/focus zones preferably mitigates one or more of the undesired sound source(s) in a space having a plurality of microphones and at least one desired sound source. Preferably, at least one microphone input receives plural microphone input signals from the plurality of microphones in the space. Preferably, the least one processor is coupled to the at least one microphone input and receives the plural microphone input signals. Preferably, the at least one processor determines plural micro-zones in the space. Preferably, the at least one processor determines a threshold sound field level for each micro-zone based on received plural microphone input signals that correspond to the one or more undesired sound source(s). Preferably, the at least one processor recognizes a desired sound source when received plural microphone input signals exceed one or more threshold sound field level.

The invention discloses a detection method and device for tunnel lining concrete void. In the method, first, a sound wave reflection fundamental frequency is determined on a lining concrete module, then detection points and a sound wave frequency transmit-receive pickup device are arranged on a surface of a lining concrete to be detected, Monitoring of a reflection wave after a sound wave signal goes through the lining concrete is carried out, and if the frequency changes, hollowing is formed. a sound wave reflection signal is recorded by a sound wave frequency emitting and receiving instrument, processing and analysis of change of the sound wave fundamental frequency of the detection point are carried out by a computer, and the following condition of the lining concrete at the detection point is calculated according to the change of the sound wave fundamental frequency. The method is advantaged by convenient usage, high precision and low cost.

The embodiment of the invention discloses an acoustic echo elimination and dereverberation method and device. The method comprises the steps of: determining a corresponding frequency domain signal according to a microphone pickup voice time domain signal and a far-end speaker voice time domain signal transmitted by a loudspeaker; determining estimated masking according to a microphone pickup voicefrequency domain signal, a far-end speaker voice frequency domain signal and an echo elimination stage neural network in a preset cascade network; determining hidden masking according to the estimated masking, the amplitude spectrum of the microphone pickup voice frequency domain signal and a dereverberation stage neural network in the preset cascade network; and determining an estimated target voice time domain signal according to the amplitude spectrum of the microphone pickup voice frequency domain signal, the estimated masking, the hidden masking and the phase of the microphone pickup voice frequency domain signal. According to the embodiment of the invention, through the preset cascade network, echoes in the microphone pickup voice time domain signal are suppressed, reverberation isalso suppressed, the microphone pickup voice time domain signal is enhanced, and the integrity of the target voice is maintained.