192 results about "Acoustic frequency" patented technology

The invention discloses a fan blade diagnosis method and system based on voiceprint perception, and relates to the technical field of intelligent monitoring of wind power equipment, and the method comprises the steps: carrying out frequency domain compensation processing, stripping environment wind noise components, and generating a pure voiceprint signal based on a wind flow characteristic parameter set; based on the pure voiceprint signal, identifying a sensitive acoustic frequency band of the fan blade, exciting a sound wave phase synergistic effect in the sensitive acoustic frequency band, and generating an enhanced voiceprint signal; quantifying the internal damage depth of the fan blade material according to the enhanced voiceprint signal, and calculating a sound energy flow disorder degree index; according to the sound energy flow disorder degree index, the blade health state of the fan is judged through a multi-dimensional acoustic characteristic state space mapping mechanism, and a three-dimensional health assessment report is generated; through a physical level wind noise stripping technology, a transfer function matrix is generated based on vortex interference modeling and sound wave-airflow phase offset correction, frequency domain energy reweighted decoupling is realized, and environmental wind noise is accurately stripped in a strong turbulence environment.

The invention provides an abnormal blood sampling inspection data evaluation processing method and system of a blood sampling system. Wherein the diffusion track dynamic state of an anticoagulant-blood contact surface in a blood sampling tube is tracked in real time, dielectric response waveform distortion characteristics on the two sides are synchronously collected through a capacitance sensor array, and diffusion form parameters are generated; curvature sudden change is analyzed to trigger an acoustic fluid device to modulate audio frequency and flow velocity, and a composite disturbance field is formed; performing capacitance axial scanning on the disturbed mixed fluid, extracting phase angle offset and gradient abrupt change point coordinates, and constructing a dielectric anomaly three-dimensional map; matching a standard dielectric model, positioning a coordinate set of a concentration gradient imbalance area and a coordinate set of an eddy current attenuation area, and generating an anticoagulant abnormal index and a mixed defect matrix in combination with phase angle offset difference; and establishing a data anomaly degree evaluation function based on the anomaly index and the defect matrix, dynamically associating a clinical error threshold, and outputting a test evaluation result. According to the invention, anticoagulant diffusion can be monitored in real time, and the mixing quality error can be accurately evaluated.

The invention discloses a space-space-ground-well integrated carbon dioxide sequestration leakage monitoring method and system, and relates to the technical field of carbon dioxide sequestration leakage monitoring, and the method comprises the steps: carrying out the remote sensing measurement of a target region through a synthetic aperture radar and a satellite, and determining a carbon dioxide sequestration leakage monitoring boundary; performing photogrammetry by using an unmanned aerial vehicle, and constructing a three-dimensional real scene model Surveying the target area on site to obtain surveying and mapping data; based on the key monitoring area, an absorption spectrum and earth surface leakage flux are obtained through infrared spectrum monitoring and vorticity monitoring; gravity monitoring data, storage area underground water parameters, carbon dioxide plume distribution conditions and logging sound wave frequency distribution characteristic graphs are obtained through gravity monitoring, underground water monitoring, optical fiber monitoring and sound wave logging monitoring. And through comprehensive analysis, according to a comprehensive analysis result, whether carbon dioxide leaks is judged, and a carbon dioxide sequestration leakage monitoring result is obtained. The accuracy of carbon dioxide sequestration monitoring can be effectively improved.

Broad frequency acoustic imaging techniques for inspection and analysis of mechanical equipment are disclosed. In some instances an acoustic imaging device may obtain acoustic response data regarding acoustic signals emitted by mechanical equipment across a plurality of frequencies. The frequencies may be selected based on a characteristic of the mechanical equipment, or may be broadly selected across an acoustic frequency range. The acoustic signals may be compared to baseline acoustic signals emitted by mechanical equipment, and analyzed to determine at least one of a severity of degradation or a type of degradation.

The invention discloses a high-performance CPU-GPU (Central Processing Unit-Graphics Processing Unit) cooperative processing architecture of an audio frequency integrated signal processor, belonging to the technical field of audio frequency integrated signal processing, the architecture is based on a dynamic priority scheduling model and realizes efficient collaboration of a CPU and a GPU through hierarchical resource management and protocol level optimization, a hardware layer adopts a multi-GPU cluster and a distributed storage node, and the CPU-GPU cooperative processing architecture has the advantages that the multi-GPU cluster and the distributed storage node are integrated; high-concurrency task processing is supported; the transmission layer fuses RapidIO and an Ethernet protocol, and adapts to a short frame control signal and a long packet data stream respectively; and the application layer calculates task resource demands through dynamic priority weights, and ensures low time delay of key tasks in combination with a normalized allocation algorithm. According to the architecture, in an audio signal processing scene, the task scheduling efficiency is improved by 40%, the short frame transmission delay is as low as 0.5, the throughput of a long data stream reaches 100 Gbps, and the requirements for real-time performance and calculation precision in a complex acoustic environment can be met.

The invention provides a factory boundary noise online monitoring traceability system and method, and belongs to the technical field of noise monitoring. The system comprises a data acquisition module; the data processing module is used for judging whether factory boundary noise processing is carried out or not; when the boundary noise processing is determined to be carried out, determining a direction corresponding to the directional microphone with the maximum sound level as a noise source direction; based on the noise source direction, a data acquisition instruction is generated and sent to the data acquisition module, and audio frequency information and video information, collected in real time and fed back by the data acquisition module, in the noise source direction are recycled; and taking the audio frequency information and the video information in the noise source direction as input parameters, and based on a pre-established abnormal sound source positioning model and a pre-established sound feature recognition model, obtaining a noise source visual sound field cloud picture and a noise classification recognition result. The purposes of noise comprehensive response, noise orientation definition and noise accurate traceability are achieved, evidence is provided for factory boundary noise source definition, and disputes are effectively avoided.

The invention belongs to the technical field of refrigeration, and discloses a leakage detection and protection system and method for an oil-containing refrigeration system, which integrates audio frequency acquisition, processing identification, analysis decision and signal output, and realizes real-time detection of leakage of a refrigerant in an air conditioner pipeline. Meanwhile, two pressure relief protection schemes of a negative pressure protection system and a capacity expansion protection system are combined, and the pipeline pressure can be rapidly reduced while the leakage area is blocked. Therefore, quick response can be ensured when leakage occurs, the system is effectively prevented from being damaged, leakage detection and protection are efficiently achieved, the whole process is automatically operated, manual intervention is not needed, and the safety and reliability of the system can be greatly improved.

The invention relates to the technical field of oil-water detection equipment, and discloses an oil-water detector and method based on a liquid mass resonance measurement principle. The oil-water detector based on the liquid mass resonance measurement principle comprises a parameter sensing unit which is used for contacting an oil-water mixed medium in a pipeline and comprises a current carrying body with a measurement cavity, a measurement probe arranged in the measurement cavity and a resonance body arranged in the measurement probe; and the data processing unit is in signal connection with the parameter sensing unit and comprises a signal transmitting module which is used for transmitting an audio frequency sweep frequency signal to the resonant body to excite liquid column resonance and transmitting electromagnetic short waves with a preset frequency to an oil-water mixed medium at the same time. According to the invention, direct measurement of the density and the dielectric constant is fused, the phase state is identified by using an intelligent algorithm, and the model is switched, so that the problem of failure of a single principle technology in a specific phase state is solved, and high-precision measurement in a water-in-oil state or an oil-in-water state in a full range from pure water to pure oil is realized.

The invention belongs to the technical field of gas sensors, and particularly relates to an ultra-low power consumption nano-electromechanical resonant NO2 gas sensor based on an audio frequency comb and a method. Wherein the drain electrode and the source electrode are respectively arranged on the silicon dioxide insulating layer, an I-shaped groove is embedded in the silicon dioxide insulating layer between the drain electrode and the source electrode, an I-shaped gate electrode is arranged in the I-shaped groove, and the adsorption layer is laid on the silicon dioxide insulating layer and covers the surfaces of the drain electrode and the source electrode. The middle part of the adsorption layer is suspended above the I-shaped gate electrode, and the silicon dioxide insulating layer is arranged on the monocrystalline silicon substrate; specific detection of NO2 is achieved through single-layer graphene, the internal resonance excitation audio frequency comb phenomenon is introduced, the gas detection sensitivity and resolution are greatly improved, and sub-ppb-level NO2 gas detection is achieved.

A method for detecting interference between a transducer of acoustic signals and a sensor having a mechanical resonance frequency with a frequency band that includes transmitting an acoustic signal within a known range of frequencies, in a sequence during a predetermined time window, monitoring the output signal from the sensor within said time window, comparing the transmitted signal with the sensor output signal and detecting deviations in the sensor output signal corresponding to frequencies in the acoustic signal, and determining the acoustic frequencies interfering with the sensor signal. A system for detecting interference including a transducer, configured to emit a sequence of acoustic signals, and a sensor configured to produce an output signal, an analysis unit adapted to monitor said output signal with the acoustic signal.

The invention discloses a sound compatibility-oriented audio frequency integrated management method, which comprises the following steps of: when any receiving end receives an external sonar signal, determining an enabled audio frequency function based on the working state of the receiving end, and searching an audio frequency characteristic under the corresponding audio frequency function from an audio frequency data management library; performing signal separation on the external sonar signals based on the audio frequency characteristics to obtain first-class audio frequency signals under audio frequency integrated management, and performing subtraction of the first-class audio frequency signals on the received external sonar signals to obtain second-class audio frequency signals; and carrying out signal filtering and separation on the second type of audio signals by adopting a blind source separation technology in a prior communication mode to obtain third type of audio signals sent by the friend sonar equipment which does not establish communication connection. According to the invention, the integrated management technology of audio frequency characteristics is utilized, and the accurate audio frequency characteristic matching and signal separation technology is adopted, so that the interference of external sonar signals is effectively reduced, and the definition and reliability of the sonar signals are improved.

The invention discloses a marine audio frequency integrated resource scheduling configuration management system, which comprises a data management module used for acquiring the current task condition of state data of an underwater audio frequency task and an audio frequency assembly; the task decomposition module is used for decomposing the underwater audio task, determining a newly-added execution task according to the current task condition, and determining a newly-added audio demand according to the newly-added execution task; the dynamic scheduling module is used for determining an optimal audio frequency resource scheduling configuration strategy according to the newly added audio frequency demand and the state data; and the audio component control module is used for controlling the audio component to execute the audio resource scheduling configuration strategy.

The embodiment of the invention discloses a ring main unit aging state monitoring method and device, electronic equipment and a readable medium. A specific embodiment of the method comprises the following steps: acquiring an in-cabinet gas concentration information sequence, an in-cabinet audio signal, an in-cabinet mechanical signal and temperature and humidity information; performing gas feature extraction on the in-cabinet gas concentration information sequence to generate gas feature information; carrying out audio frequency feature extraction on the in-cabinet audio frequency signal to generate audio frequency feature information; performing mechanical characteristic extraction processing on the in-cabinet mechanical signal to generate mechanical characteristic information; performing multi-modal feature fusion on the gas feature information, the audio frequency feature information and the mechanical feature information to generate joint feature information; generating a prediction result of the health degree and the aged mechanical part of the ring main unit; and updating the monitoring period condition, and carrying out monitoring and early warning. According to the embodiment, the detection rate of the aging state of the ring main unit can be improved, so that the safety of power distribution equipment is improved.

The invention relates to the technical field of pipeline safety monitoring, in particular to an intelligent pipeline leakage monitoring system and method based on audio frequency, and the system comprises an audio frequency signal collection module, a noise filtering and feature extraction module, a leakage recognition and positioning module, and a state evaluation and alarm module. Wherein the audio signal acquisition module is used for acquiring pipeline audio signals and outputting original audio signal data; the noise filtering and feature extraction module is used for carrying out filtering processing to suppress environmental noise and extracting feature vectors related to leakage; the leakage identifying and positioning module is used for identifying whether a leakage event exists or not and calculating the position of a leakage point relative to an adjacent sensor; and the state evaluation and alarm module is used for generating a leakage state evaluation result. According to the invention, by constructing a closed-loop monitoring process from audio frequency acquisition to alarm output, accurate identification, spatial positioning and graded evaluation of a pipeline leakage event are realized, and the response efficiency and practicability of the monitoring system are significantly improved.

The invention discloses a marine water sound and audio integrated architecture, which comprises a networking management module used for networking a plurality of audio devices in a preset range through a pre-deployed networking rule; the data acquisition module is used for receiving external audio frequency data in real time through each audio frequency device and preprocessing the external audio frequency data; the space-time reference unification module is used for converting the external audio frequency data dispersed at each position into a space-time coordinate system unified with the information processing center and carrying out unified time difference calibration work on the external audio frequency data; and the integrated management module is used for issuing a control instruction to each audio frequency device and performing integrated processing on the acquired external audio frequency data so as to complete detection, tracking, identification and the like of a target. According to the invention, through efficient networking management, data acquisition, time difference calibration and integrated management, dynamic scheduling and integrated processing of a plurality of audio frequency devices are realized.

The invention discloses a health management method for a GPU computing board card of an audio-frequency integrated signal processor, and belongs to the technical field of audio-frequency integrated signal processing. Multi-dimensional data of a GPU core, a video memory and a power supply module are collected in real time through a sensor, a three-dimensional temperature field is constructed by adopting an inverse distance weighted interpolation algorithm, and a thermal coupling area is accurately positioned; thermal field evolution is predicted based on an LSTM model, and a high-density instruction is dynamically scheduled to an NUMA core with sufficient heat dissipation allowance; aiming at sudden reading and writing of a video memory, a micro piezoelectric fan array is adopted to form vertical airflow (the wind speed is greater than or equal to 4m / s), and dynamic voltage reduction and graded heat dissipation strategies (phase change heat-conducting fins are pre-cooled to reduce the temperature by 8-10 DEG C, and the attack angle of centrifugal fan blades is 45 degrees) are combined. According to the scheme, the heat source recognition precision is improved by 40%, the heat dissipation delay is smaller than or equal to 45 microseconds, the calculation power loss is smaller than or equal to 0.8%, the video memory error rate is smaller than or equal to 1E-6, and high-density calculation heat management is remarkably optimized.

The invention provides an acoustic modal test method and device, electronic equipment and a storage medium, and the method comprises the steps: controlling at least one sound source device to output a preset audio signal at the same time; acquiring response signals detected by the plurality of sensors; the plurality of sensors are used for respectively executing sound detection at a plurality of detection positions in a compartment area; establishing a geometric model based on the audio signal, the detection position and a response signal detected by the sensor; and analyzing the geometric model to obtain an acoustic modal test result. According to the embodiment of the invention, the acoustic modal test result measured by the method is beneficial to improving the riding experience of passengers.

The invention provides an online comprehensive detection, analysis and evaluation method and system for a power equipment bearing, and the method comprises the steps: obtaining four-dimensional operation parameters of the bearing in real time, including a temperature and vibration value, an audio frequency spectrum feature, a dynamic maintenance period parameter and a bearing load rate parameter; establishing a correlation model of specific frequency band energy change and vibration value fluctuation in the audio frequency spectrum characteristics through space-time correlation analysis, injecting a dynamic maintenance period parameter as a time domain attenuation factor into the correlation model, and dynamically weighting based on a bearing load rate parameter to generate a health degradation index; when the health degradation index exceeds a dynamic threshold value, generating a pre-maintenance instruction, and outputting a maintenance strategy containing a fault positioning map; a pre-maintenance instruction and a maintenance strategy are packaged according to an industrial communication protocol, and a correlation analysis view and an early warning window are dynamically embedded in a distributed control system interface, so that the accuracy of bearing online monitoring is effectively improved.

1. Name of the Design Product: Cross - broadcast Sound Bridge. 2. Use of the Design Product: The design product is used for adjusting audio frequency. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

An ultrasonic dust removal device, comprising: positive pressure cavities (10) and air blowing cavities (20) which are sequentially arranged in a first direction, wherein each air blowing cavity (20) comprises a communicating flow channel and at least two ultrasonic generating cavities (21) connected in series by means of the communicating flow channel, the air blowing cavity (20) is communicated with the corresponding positive pressure cavity (10) by means of the communicating flow channel, the portion of the communicating flow channel distant from the positive pressure cavity (10) forms an air blowing flow channel (22) capable of blowing air to the outside, and the ultrasonic generating cavities (21) expand outward with respect to the communicating flow channel in a second direction; and a negative pressure cavity (30) and an air suction hole (40) which are communicated with each other, wherein the air suction hole (40) and the air blowing flow channels (22) are located at the same end of the ultrasonic dust removal device in the first direction; the cavity wall of at least one ultrasonic generating cavity (21) comprised in each air blowing cavity (20) is recessed inward to form at least one first groove (50), and the positive pressure cavities (10), the air blowing cavities (20) and the first grooves (50) all extend in a third direction; and a first cross section of each first groove (50) is arc-shaped. The arc-shaped grooves in the ultrasonic generating cavities (21) are conducive to the movement of sound waves, reducing the sound wave energy loss caused by agitation, improving sound frequency effect, and thus saving gas flow.

The invention relates to the technical field of pest control, and particularly discloses piercing-sucking type pest vibration interference equipment and an ultrasonic audio frequency orientation system thereof, the piercing-sucking type pest vibration interference equipment comprises an upper fixing plate and a lower fixing plate which are of an arc-shaped structure, and a vibration interference unit is fixedly installed between the upper fixing plate and the lower fixing plate. According to the piercing-sucking type pest vibration interference equipment and the ultrasonic audio frequency orientation system thereof, low-frequency interference signals and ultrasonic carrier signals are modulated on the basis of frequency spectrum characteristics of target pest interference signals, modulated ultrasonic signals are sent out through an energy converter (namely an orientation player) in the vibration interference unit, and then the target pest interference signals are sent out. The ultrasonic waves are self-demodulated into high-directivity interference signals in the air, and the interference signals are accurately transmitted to the edge position or the irregular dead angle area of the field, so that the interference signals of an omnidirectional player in the field are prevented from being attenuated to be invalid when reaching the edge position or the dead angle area of the field; the two players are matched with each other, so that the power of the internal omnidirectional player does not need to be greatly improved, and noise pollution is avoided.

The invention provides a special gas box for a multifunctional audio-frequency environment-friendly drilling machine, which comprises a gas outlet end assembly and a gas inlet end assembly, the gas outlet end assembly comprises a gas outlet end mandrel and a gas outlet end mandrel jacket, the gas outlet end mandrel is provided with a through upper central gas passage, and the gas outlet end mandrel jacket is provided with a gas outlet communicated with the upper central gas passage; the air inlet end assembly comprises an air inlet end mandrel and an air inlet end mandrel outer sleeve, a double-wall inner pipe is arranged in the center of the air inlet end mandrel, and the double-wall inner pipe is provided with a lower center air channel and an annular air channel. The air inlet end mandrel outer sleeve is provided with an air inlet communicated with the annular air channel. The top of the air inlet end mandrel is connected with the bottom of the air outlet end mandrel; the air outlet end mandrel outer sleeve and the air inlet end mandrel outer sleeve are connected through a connecting piece. After the air box is installed on the multifunctional audio frequency environment-friendly drilling machine, the reverse circulation down-the-hole hammer can be used on the multifunctional audio frequency environment-friendly drilling machine.

In order to adapt the frequency response of headphones, various filters are used, including shelving or frequency-shelving filters. However, these are usually implemented electronically. In the case of wired headphones without their own voltage supply, however, no electronic signal processing is possible. In order to realise an acoustic shelving filter, an acoustic damping element (DD) having a flat, acoustically effective damping material, which has a defined specific acoustic resistance, is placed in front of the radiating surface of the sound transducer at a small distance (d) in relation to the diameter of the acoustic damping element. It thus forms a flat air gap (AG), which is open at the edge, with respect to the radiating surface of the transducer. Acoustic properties of the shelving filter can be controlled by the size and material of the damping element (DD) and its distance from the sound panel (SW) or from the transducer (W).

The invention relates to the technical field of acoustic monitoring, in particular to an intelligent water affair voice broadcasting method and system based on intelligent audio frequency monitoring, and the method comprises the following steps: collecting sound pressure level data and sound wave frequency content through an underwater acoustic sensor, recognizing abnormal water flow sound wave features, calculating the abnormal level of a water affair event, and screening the types of water flow sound signals; and a characteristic frequency band interval is divided, and a water environment acoustic characteristic set is generated. According to the invention, through extraction and analysis of the sound pressure level data and the sound wave frequency, the abnormal level of the water affair event can be accurately monitored and predicted in real time, the potential water affair problem can be rapidly dealt with, the risk to the environment and public safety is effectively reduced, the fundamental tone frequency is optimized, the definition and understandability of voice broadcast are improved, and the voice broadcast experience is improved. The method is more obvious especially in a multi-noise environment, and the sound transmission quality is effectively optimized and misunderstanding caused by noise interference is remarkably reduced through detailed analysis of background noise and adjustment of sound signals to adapt to the noise environment.

The invention provides a sound wave optical cable positioning method and system, and relates to the technical field of deep learning, and the method comprises the steps: uniformly arranging vibration sensors on a sensing optical cable, demodulating a back scattering light signal to obtain a differential phase signal, and constructing a self-correlation loss function. Preprocessing sound source data, extracting an audio frequency semantic feature vector, and calculating a dot product of a frequency spectrum centroid and frequency spectrum flatness to obtain a frequency spectrum loss function; and a phase change loss function is obtained by combining the ratio and the refractive index of the strained optical fiber and the non-strained optical fiber. And weighting the three loss functions to form a fusion loss function. And constructing a sound wave positioning model, and training the model to be optimal based on the fusion loss function. And finally, segmenting and enhancing audio data, and inputting the audio data into the trained model to obtain a positioning result. According to the method, the positioning model is trained by fusing multiple different types of loss functions, so that the positioning precision of sound waves in the optical cable is improved.

The utility model discloses a wine body audio frequency generating device based on 360-degree shaking, which comprises a fixed seat (1), a rotating power motor (2) is arranged on the fixed seat (1), a 360-degree rotating table (3) is arranged at the output end of the rotating power motor (2), and a wine bottle fixing component (4) is arranged on the front surface of the 360-degree rotating table (3); an audio acquisition module (5) is arranged in the middle of the interior of the 360-degree rotating table (3) and connected with a main control board (6). The 360-degree wine shaking device can achieve the purpose of 360-degree wine shaking.

The present invention relates to the technical field of pest control, and specifically discloses a vibration interference device for piercing-sucking pests and an ultrasonic audio directional system thereof, comprising an upper fixed plate and a lower fixed plate in an arc-shaped structure, between which a vibration interferer is fixedly installed. The vibration interference device for piercing-sucking pests and the ultrasonic audio directional system thereof modulate a low-frequency interference signal with an ultrasonic carrier signal based on the spectral characteristics of the interference signal of the target pest, and emits a modulated ultrasonic signal through a transducer (i.e., a directional player) inside the vibration interferer. The ultrasonic wave self-demodulates a highly directional interference signal in the air, and accurately transmits the interference signal to the edge of the field or an irregular blind spot, thereby preventing the interference signal of the omnidirectional player inside the field from being attenuated to ineffectiveness when reaching the edge of the field or in the blind spot. The use of two players in combination does not require a significant increase in the power of the internal omnidirectional player, thus avoiding noise pollution.

The present invention is titled "Method and System for Training Cockpit Speech Recognition Acoustic Model Using Multi-Level Corpus Data Augmentation". The present invention discloses a method for initializing a device that enables a computer system including at least one processor and a system memory element to perform ASR using an acoustic speech recognition (ASR) model. The method includes obtaining, via at least one processor through a user interface, multiple speech data pronunciations of a predetermined phrase. The multiple speech data pronunciations include a first number of audio samples of the actually pronounced speech data, and each of the multiple speech data pronunciations includes one of the audio samples, and the audio samples include audio components. The method further includes performing multiple augmentations on the multiple speech data pronunciations of the predetermined phrase to generate a corpus audio data set, the corpus audio data set including a first number of audio samples and a second number of audio samples, and the second number of audio samples including an augmented version of the first number of audio samples.

The application provides a ball and socket type rope coring drill tool suitable for an audio frequency drilling machine, which comprises an outer pipe assembly for downward drilling and an inner pipe assembly for sampling, the inner pipe is arranged in the hollow inner cavity of the outer pipe, and the top of the inner pipe is provided with a ball and socket mechanism and a fishing spear, the ball and socket mechanism is used for realizing the clamping or separation between the inner pipe assembly and the outer pipe assembly when the inner pipe assembly is moved into position relative to the outer pipe assembly. The whole drill tool has simple structure, high outer pipe thread strength, can achieve waterless drilling, the ball and socket mechanism has accurate positioning, reliable locking and easy unlocking, and the drill tool can improve the comprehensive drilling efficiency and greatly reduce the labor intensity.

There is disclosed a thermoacoustic system. The system comprises a thermocouple junction and an electronic signal generator for generating an acoustic frequency driving signal across the junction, which causes the system to generate an acoustic wave via the Peltier effect.