About Us
BACKGROUND
AATC entered the electroacoustic market in 1996, and now has customers all over Taiwan and overseas, and its industries cover consumer, industrial, medical, automotive and other end markets. Our factory is located in mainland China, with hundreds of people in the production line and dozens of people in engineering research and development. At the same time, we are also actively moving towards production bases in South Asia or Southeast Asia to improve the local raw material supply chain. As the R&D and sales headquarters, Taipei has business marketing and engineering and technical personnel. Based on the solid foundation of Taiwanese brand customers, products and services are vigorously promoted overseas based on export sales and Taiwan’s image.
The products we provide are mainly passive electroacoustic components , which are often classified as electromechanical components, such as buzzers, speakers, microphones, etc. In order to make it easier for customers to use the above-mentioned electro-acoustic components , Haocheng also provides consulting services covering design, optimization, simulation, verification, trial production adjustment, mass production scale, etc. The response speed in sample production and customization is also very fast . extremely fast. As far as the audio signal chain is concerned, Haocheng has relevant experience in audio recording, amplification and noise reduction, transcoding decoding, equalization filtering, audio transmission, sound playback , feedback loop, etc., to ensure signal integrity. We also joined the Electroacoustic Industry- University Technology Development and Verification Alliance (EATD) to conduct technical exchanges, and also interacted with laboratories in domestic colleges and universities to absorb the energy of industry-university cooperation and recruit new talents.
of measurement , Haocheng’s anechoic room has been strictly certified, and the measurement equipment is world-recognized major manufacturers SoundCheck , B&K, GRAS, etc., from the size and material of the baffle , audio amplifier, measurement standard microphone, artificial mouth and artificial ear, etc., All strive for the best consistency, and also comply with relevant regulations such as ISO and IEC. We are also happy to provide relevant measurement fixtures and EVBs, or mechanism fixture design and consultation for verifying acoustic components on the production line . Haocheng can also provide directivity, transient waterfall diagram (CSD), wireless connection, multi-channel I/O and artificial head -mounted measurement services. For special needs, we can also assist Teams, Zoom, Google, Amazon, Cortana and other projects. In the field of electroacoustics , Haocheng is your indispensable good partner.
Product
In terms of products, we first tested the buzzer with buzzers, specializing in electromagnetic and piezoelectric technologies. Buzzers have been widely used in communication equipment and computer hosts. The simple beeping sound is the memory of many people for 3C products.
We also produce piezo alarms or mechanical buzzers for special security or machine applications. Buzzers have matured and can be built with various tone ICs to provide continuous tones, intermittent tones, and audio content of various frequencies and melodies. The piezoelectric sheet in the buzzer is also a highly efficient electroacoustic transducer , which is often used in physical applications such as ultrasonic transmission, reception, and even higher frequency atomization and cleaning.
With the diversification of sound-producing information, Haocheng stepped into the speaker market, mainly designing and manufacturing miniature dynamic speakers. There are various types of dynamic speakers , ranging from general circular, oval to rectangular, with different sizes and powers. We have developed corresponding diaphragms with different materials and textures , and magnetic circuits with different structures. We also provide solutions such as speakers and speakers, and design single-channel or multi-channel speaker and speaker combinations according to the customer’s organizational conditions, sound output direction, and bandwidth requirements. In special product applications, Haocheng can also provide MEMS horns, piezoelectric horns, balanced armature horns, horn horns, bone conduction horns and vibration horns, etc.
In addition to buzzers and speakers, Haocheng also provides microphones, including condenser microphones, MEMS microphones and a few dynamic microphones. Haocheng ‘s condenser microphone is an electret microphone, which does not require an external polarized power supply, but only needs enough low voltage to drive the built-in amplifier. If you want to reduce the size or convert to digital, you can use MEMS-processed microphones, which not only have higher consistency but also can resist noise. In order to ensure the performance of the microphone, we also provide suggestions on the selection of rubber sleeves and sound pipes on the mechanism, damping cloth and buffer materials . Nowadays, customers have many requirements on the radio characteristics of microphones. Haocheng has its own strengths in unidirectional, bidirectional and omnidirectional microphones, or it can choose a microphone array module for subsequent signal processing.
Research and Development
Haocheng has an experienced engineering and R&D team. The supervisors all have more than ten years of experience in the electro-acoustic industry or a background in specialized electro-acoustic institutes.
They are strong in acoustics, electronics, and mechanisms, and can meet the diverse requirements of customers. For example, circuit debugging includes waveform modulation, various gains, equalization (EQ) and filter adjustments, extending to audio codec (Codec), amplification circuit design, feedback removal (AEC), noise reduction (NC), voice processing And array signal processing (DSP) for speakers and microphones, etc. Institutional R&D and consulting fields such as speaker design, vibration reduction and feedback removal, buffer sealing materials, acoustic damping and waterproof mechanism design, and array placement settings are all our expertise . Hao Cheng has profound experience in the most common speaker design, including rib column design, flesh thickness, sound output position and hole shape, relative placement of dual -unit speakers, etc.
In the field of basic research of acoustics, we also continue to refine various topics and combine theory with practice. For example, plane waves can be applied to the pressure field of headphones and conduits, while spherical waves are the free radiation sound field of speakers. Using the equivalent circuit method of lumped parameters , physical elements such as pipes, slits, screens, holes, and horns can be mapped to acoustic elements. This does not require the use of more complicated wave differential equations or transformation matrices involving trigonometric functions. The advantage is that the calculation speed is within a few milliseconds, the modeling is efficient, the optimization trial and error is fast, and the prediction accuracy is sufficient. The relevant simulation programs are circuit software such as LTSpice and Micro-Cap. In the face of more complex spatial geometry, or higher predictability requirements for medium and high frequencies, the finite element method or the model of finite elements combined with equivalent circuits can be used to meet more stringent requirements. The relevant simulation programs are COMSOL, Ansys or simpler software such as Loudsoft .
So far, the importance of subjective listening has been increasing day by day in the miniaturized electro-acoustic industry. Many concepts of psychoacoustics are closely related to objective parameters and have become a comprehensive framework for evaluating components such as loudspeakers. Haocheng ‘s technical team has conducted in-depth research on how the human ear perceives different timbres and harmonics , and will have different feelings under different loudness and excitation signal connotations. As far as algorithms are concerned, we can help customers understand issues such as virtual low frequency, audio compression and dynamic range control, and can also adjust the frequency response and distortion performance of speakers according to the sense of hearing . We borrowed from the listening standards of large speakers, and also introduced the evaluation of micro speakers. Some evaluation categories include low-frequency depth, mid-frequency clarity, high-frequency crispness, naturalness of the sound field, and sound detail performance.
Manufacturing
Haocheng continues to invest in semi-automated and fully-automated production equipment to enhance the efficiency of mass production and improve the consistency of product specifications.In terms of loudspeakers, automation equipment requires many tailor-made production fixtures , and also ensures that the diaphragm, voice coil , frame, elastic wave, suspension edge , and magnetic circuit gap are all centered and symmetrical, and the diaphragm will not move up and down. Jammed noise or damage. As far as raw material processing is concerned, there are also magnetizers for magnets , winding machines for voice coils , and glue dispensers for joints of mechanical components in the factory . In addition, both the Changzhou factory and the Taipei laboratory have signal generators, frequency sweepers , electric meters, oscilloscopes, polarity meters, impedance analyzers, and power supplies for measuring electroacoustic characteristics.
As far as the glue dispenser is concerned, it is necessary to simulate and continuously adjust the glue output and speed, movement trajectory and mixing formula of the glue dispenser. At the same time, we also need to ensure that volatile materials such as glue meet environmental protection and human health standards, high and low temperature resistance, and reliability standards for cold and hot cycles, but they must not lose the effectiveness of the joint, and also meet the cost-effective requirements of customers. Loudspeaker joints are numerous and require different adhesive properties, sizing and curing methods, and needle gauges. Related parameters such as the air pressure in mPa , the number of seconds of front delay , the number of seconds of glue out delay , and the number of seconds of back delay . Some are cured at room temperature, some are in the oven , some are UV cured, etc. In terms of parts, some are suitable for AB glue of magnetic steel, center and edge glue of diaphragm , center and edge glue of elastic wave , damping glue, and the magnetic circuit must be cleaned after glue application . After the speaker is assembled, it is also necessary to test the polarity and pure tone, then solder the wires and apply protective glue, and then send it to more advanced tests such as reliability tests after packaging.
Haocheng took the above dispensing process as an example, saying that we will treat every electro-acoustic product , every product raw material, and the SOP design and production of every process with the same care and professionalism. For example, the microphone diaphragm must pay attention to the problem of partial flesh and different residual stress. At this time, the prestress, tension, evaporation and polarization process must be properly maintained . These are the long-term interaction and cooperation between Haocheng and raw material suppliers. The resultant accumulation of technology and experience. In the case of piezoelectric ceramics, it is generally a polycrystalline material produced by a high-temperature sintering process. The composition of the ceramic material can be adjusted, and the sintering method can be changed to control its electromechanical coupling coefficient, dielectric and piezoelectric constants, temperature characteristics and aging . Performance, etc., these are also the research and development results of our long-term trial and error optimization with ceramic material suppliers .
Customer
Key Fact
Strategy
AATC ‘s strategy is to provide a series of products, services and solutions for the electroacoustic market . In addition to the standard and general design and manufacture of buzzers, speakers and microphones, we have also successively approached many customized projects, and introduced our tailor-made products into customers’ projects through design-in and design-win. These aspects include size, shape, volume, bandwidth and sound quality, impedance and power consumption , cost advantage, convenience of mass production, etc. Haocheng can realize the most ideal electroacoustic products in the hearts of customers.
In terms of business strategy, we can flexibly carry out a small amount of diversified production, and can also quickly supply large quantities according to demand forecasts. Facing customers with long-term cooperation and deep relationships, we are happy to prepare materials in advance and provide more value-added services, including electronic debugging, organization integration, 3D printing and manual sample production, system simulation and verification, or assisting end products Sales, search for ecosystem partners, etc.
In order to expand our resources and capabilities, we cooperate with the world’s best companies in and outside the industry to serve our customers. For example, we signed an agency contract with USound, a leading Austrian MEMS speaker manufacturer, and a distribution contract for MEMS microphones with Merry Industrial, a listed domestic electro-acoustic manufacturer. We welcome any company that wants to develop new product technology channels in the Taiwan market to discuss potential cooperation with us.
Outlook
At the same time, as far as the speaker is concerned, it must maintain a certain volume and a wide frequency response. This depends on the tuning process of the new suspension and vibration system, as well as the miniaturization and efficiency of the magnetic circuit . In addition, for receivers, amplifiers and processors, Haocheng is also committed to reducing operating power consumption , quiescent current and shutdown current.
For special industrial, security, medical or automotive applications, in order to meet ISO and UL regulations, etc., we also continue to develop large sound pressure, high temperature resistance, anti-noise and static electricity, and smarter module solutions. Facing the customer’s automatic production and loading requirements , Haocheng will continue to develop products with different packaging, such as pin-type products in radial tape-and – reel packaging ; The buzzer is converted into a product with a wire or a connector terminal, which is convenient for the expedient modification of the mechanism.
The importance of acoustics in the electronics and technology industry is increasing day by day, and Haocheng is the best helper for customers and partners to consult about acoustics. In the future, Haocheng will continue to pay attention to the evolution of comprehensive international standards such as ISO, IEC, AES, UL, ITU, IATF, RoHS , and REACH, as well as the communication standards of major consumer product manufacturers. We have a far-sighted view, insight into the psychology of the end mass consumers, and then look back to brand factories, system factories, component ecological supply chains, etc., building a dense acoustic knowledge system and service network layer by layer, in order to form a complete solution context.
The products we provide are mainly passive electroacoustic components , which are often classified as electromechanical components, such as buzzers, speakers, microphones, etc. In order to make it easier for customers to use the above-mentioned electro-acoustic components , Haocheng also provides consulting services covering design, optimization, simulation, verification, trial production adjustment, mass production scale, etc. The response speed in sample production and customization is also very fast . extremely fast. As far as the audio signal chain is concerned, Haocheng has relevant experience in audio recording, amplification and noise reduction, transcoding decoding, equalization filtering, audio transmission, sound playback , feedback loop, etc., to ensure signal integrity. We also joined the Electroacoustic Industry- University Technology Development and Verification Alliance (EATD) to conduct technical exchanges, and also interacted with laboratories in domestic colleges and universities to absorb the energy of industry-university cooperation and recruit new talents.
of measurement , Haocheng’s anechoic room has been strictly certified, and the measurement equipment is world-recognized major manufacturers SoundCheck , B&K, GRAS, etc., from the size and material of the baffle , audio amplifier, measurement standard microphone, artificial mouth and artificial ear, etc., All strive for the best consistency, and also comply with relevant regulations such as ISO and IEC. We are also happy to provide relevant measurement fixtures and EVBs, or mechanism fixture design and consultation for verifying acoustic components on the production line . Haocheng can also provide directivity, transient waterfall diagram (CSD), wireless connection, multi-channel I/O and artificial head -mounted measurement services. For special needs, we can also assist Teams, Zoom, Google, Amazon, Cortana and other projects. In the field of electroacoustics , Haocheng is your indispensable good partner.