An adaptive feedback suppressor

Abstract

The utility model provides a kind of self-adapting feedback suppressor, including shell body, shell body side edge side plate is equipped with vent, it is beneficial to heat dissipation;Internal components are firmly clamped by Z-shaped clamp, dustproof cover dustproof in top, inside sealing strip enhances sealing property.The front panel layout power switch, display and output volume adjusting knob / AFC bypass switch, convenient operation and check.The rear panel has input interface, input level selection switch, configuration interface, power interface and line balance output interface, and the function is rich.The suppressor can detect and suppress audio feedback in real time, output high-quality audio, can adapt to a variety of audio input devices and application scenarios, and has good protection performance, ensures stable operation of equipment, prolongs service life.

Description

Technical Field

[0001] This utility model relates to the field of audio processing equipment technology, and more specifically, to an adaptive feedback suppressor. Background Technology

[0002] Adaptive feedback suppressors play a crucial role in numerous fields, including audio processing and electronic devices. In audio systems, they are primarily used to detect and suppress howling caused by acoustic feedback, ensuring clear and stable sound playback. In electronic devices, they help maintain the stability of internal electrical signals, preventing signal interference and feedback from negatively impacting device performance.

[0003] However, with the continuous advancement of technology and the increasing complexity of application scenarios, existing adaptive feedback suppressors have gradually revealed some shortcomings in terms of structural design and heat dissipation performance.

[0004] Currently, many adaptive feedback suppressors typically use traditional mounting methods for their internal components, such as simple bolt fixing, surface mount welding, or ordinary clamp structures. These methods may meet basic mounting requirements in normal operating environments, but their limitations become apparent when the device is moved, transported, or subjected to vibration.

[0005] Under prolonged vibration, bolted fastening methods may cause bolts to loosen, leading to component displacement. While surface mount soldering can provide some degree of component fixation, the solder joints may crack due to vibration, affecting the stability of the electrical connection. Conventional clamping structures, due to their conventional design, often fail to provide sufficient clamping force to firmly secure components in a specific position. When equipment moves or is subjected to vibration, components are prone to shaking or even displacement, further impacting the stability of the electrical connection and increasing the risk of equipment malfunction.

[0006] Existing fixing methods cannot effectively prevent component displacement and movement, resulting in unstable electrical connections within the equipment. Loose components can lead to poor contact, causing signal transmission interruptions, increased noise, and other problems, severely impacting the normal operation of the equipment. Therefore, we propose an adaptive feedback suppressor to address this issue. Utility Model Content

[0007] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: an adaptive feedback suppressor, including a housing, a side plate provided on the side of the housing, ventilation holes provided on the side plate, a Z-shaped clamping plate provided inside the housing, two Z-shaped clamping plates symmetrically arranged and clamping components, a dust cover provided above the components, a sealing strip provided on the inner side of the housing, and a front panel provided on the front side of the housing, with elliptical mounting holes provided on the front panel.

[0008] As a preferred technical solution of this utility model, a power switch is provided on the front panel, the power switch is located on one side of the front panel, a display is provided on the side of the power switch, and an output volume adjustment knob / AFC bypass switch is provided on the side of the display.

[0009] As a preferred technical solution of this utility model, a rear panel is provided on the rear side of the outer shell, an input interface is provided on the rear panel, and a power switch is provided on the side of the input interface.

[0010] As a preferred technical solution of this utility model, an input level selection switch is provided on the rear panel, and the input level selection switch, the input interface, and the power supply switch are located on the same plane.

[0011] As a preferred technical solution of this utility model, a configuration interface is provided on the rear panel, and the configuration interface is arranged adjacent to the input level selection switch.

[0012] As a preferred technical solution of this utility model, a power interface is provided on the rear panel, and the power interface and the configuration interface are in a certain positional relationship on the rear panel.

[0013] As a preferred technical solution of this utility model, a line-balanced output interface is provided on the rear panel, and the line-balanced output interface, the power interface, and the configuration interface together form a specific layout on the rear panel.

[0014] As a preferred technical solution of this utility model, the Z-shaped clamp, dust cover and sealing strip are all set inside the outer shell, and the front panel and rear panel are respectively set on the front and rear sides of the outer shell, and the components form a relatively fixed position and connection relationship.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: The ventilation hole structure on the side plate creates an excellent air convection channel. When the equipment is running, the heat generated by the internal components causes the air to rise and be heated. The hot air is discharged through the ventilation holes, while cool external air enters simultaneously, forming a natural air circulation. This heat dissipation method requires no additional power equipment, effectively reducing the internal temperature of the equipment and extending the service life of the components. The Z-shaped clamps are symmetrically arranged and hold the components. The Z-shaped structure provides sufficient clamping force to firmly fix the components in a specific position. This not only prevents the components from shifting or shaking when the equipment is moved, transported, or subjected to vibration, ensuring the stability of the electrical connection, but also reduces the failures that may be caused by loose components, improving the overall reliability of the equipment.

[0016] Dust covers provide an effective dust barrier for electronic components. In everyday use, dust is a common factor affecting the performance and lifespan of electronic devices. Dust covers can prevent most dust particles from landing on components, thus extending their lifespan. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a rear-view three-dimensional structural schematic diagram provided for this utility model;

[0020] Figure 4 This is a partial structural schematic diagram of the present invention;

[0021] Figure 5 This is a schematic diagram of the rear view structure provided by this utility model.

[0022] The image shows:

[0023] 1. Outer casing; 2. Side panel; 3. Ventilation hole; 4. Z-shaped clamp; 5. Dust cover; 6. Sealing strip; 7. Front panel; 71. Oval mounting hole; 8. Power switch; 9. Display; 10. Output volume control knob / AFC bypass switch; 11. Rear panel; 12. Input interface; 13. Power switch; 14. Input level selection switch; 15. Configuration interface; 16. Power interface; 17. Line balanced output interface. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] Example 1: An adaptive feedback suppressor includes a housing 1, a side plate 2 on the side of the housing 1, a ventilation hole 3 on the side plate 2, a Z-shaped clamp 4 inside the housing 1, two Z-shaped clamps 4 symmetrically arranged and clamping components, a dust cover 5 above the components, a sealing strip 6 on the inner side of the housing 1, and a front panel 7 on the front side of the housing 1, with an elliptical mounting hole 71 on the front panel 7.

[0027] A power switch 8 is provided on the front panel 7, located on one side of the front panel 7. A display 9 is provided on the side of the power switch 8, and an output volume adjustment knob / AFC bypass switch 10 is provided on the side of the display 9. A rear panel 11 is provided on the rear side of the housing 1, and an input interface 12 is provided on the rear panel 11. A power switch 13 is provided on the side of the input interface 12.

[0028] An input level selection switch 14 is provided on the rear panel 11. The input level selection switch 14, input interface 12, and power switch 13 are located on the same plane. A configuration interface 15 is provided on the rear panel 11, and the configuration interface 15 is arranged adjacent to the input level selection switch 14. A power interface 16 is provided on the rear panel 11, and the power interface 16 and configuration interface 15 are positioned in a certain relationship on the rear panel 11.

[0029] The rear panel 11 is provided with a line balance output interface 17. The line balance output interface 17, the power interface 16, and the configuration interface 15 together form a specific layout on the rear panel 11. The Z-shaped clamp 4, the dust cover 5, and the sealing strip 6 are all located inside the housing 1. The front panel 7 and the rear panel 11 are respectively located on the front and rear sides of the housing 1, and the components form a relatively fixed position and connection relationship.

[0030] The adaptive feedback suppressor works as follows: The outer casing 1 serves as the basic framework of the entire device, providing physical protection for the internal components. Ventilation holes 3 on the side panel 2 allow for air exchange between the inside and outside of the outer casing 1. When the device is running, the internal components generate heat. Hot air is exhausted through the ventilation holes 3, while cool air enters, creating natural air convection, thereby reducing the internal temperature of the device and maintaining the normal operating temperature range of the components.

[0031] Z-shaped clamps 4 are symmetrically arranged on both sides of the component. Through their own structural characteristics, they firmly clamp the component and prevent it from shifting or shaking when the equipment is moved or subjected to vibration, thus ensuring the stability of its position and guaranteeing the reliability of the electrical connection.

[0032] The dust cover 5, located above the components, acts as a barrier to prevent dust particles from falling into the components, thus avoiding dust accumulation that could affect their performance and reducing malfunctions such as short circuits and poor contact caused by dust. The sealing strip 6, installed inside the housing 1, fills the gaps between the various parts of the housing 1, enhancing its sealing performance. It not only prevents dust from entering but also blocks moisture, preventing corrosion or short circuits caused by a humid environment.

[0033] The front panel 7 is the main interface for user interaction with the device. The power switch 8 serves as the device's start-up and shutdown control. When the user presses the power switch 8, the circuit is connected, and the device is powered on and begins to work; pressing it again cuts off the power, and the device stops operating.

[0034] Display 9 shows various operating statuses and parameter information of the device in real time, such as input audio level, output volume, and the activation status of AFC adaptive feedback control. Users can intuitively understand the current operating status of the device by observing the information on Display 9.

[0035] The output volume control knob / AFC bypass switch 10 has a dual function. When the user rotates the output volume control knob, it changes the parameters of the device's internal volume control circuit, thereby adjusting the intensity of the output audio signal and controlling the volume. The AFC bypass switch is used to toggle the AFC function on or off. When the switch is on, the device activates the adaptive feedback suppression function; when it is off, the device bypasses this function, and the audio signal is output directly.

[0036] The rear panel 11 integrates several important interfaces for audio signal input and output, as well as power supply and configuration of the device.

[0037] Input interface 12 is used to connect audio input devices, such as microphones or line-in input devices. When audio signals are transmitted to input interface 12 through these input devices, the signals enter the internal audio processing circuitry of the device.

[0038] The input level selection switch 14 provides three input level options: LOW, MID, and HIGH. Different audio input devices may output different signal levels. Users can select the appropriate input level using the input level selection switch 14 based on the actual output level of the input device to ensure that the input audio signal is within the optimal range that the device can handle, avoiding distortion due to excessively strong signals or sound quality issues due to excessively weak signals. The configuration interface 15 allows users to connect external devices, such as a computer, via USB to configure and set parameters for the device. Users can adjust various device parameters, such as frequency response and feedback suppression threshold, on a computer using dedicated software tools to meet personalized audio processing needs. The power interface 16 is used to connect an external power source, providing a stable power supply to the device. When power is connected, the power management circuit converts the external power into different voltage levels required by the internal components of the device, ensuring that each component receives appropriate power to support its normal operation.

[0039] The balanced output interface 17 is used to output the processed audio signal to other audio devices, such as power amplifiers and speakers. Balanced output effectively reduces interference and noise during signal transmission, ensuring audio signal quality and producing clear, stable audio.

[0040] In the audio signal processing process, adaptive feedback suppression is the core function of this device. When the audio signal enters the device from the input interface 12, it is first amplified by the preamplifier circuit to increase the signal strength so that it can meet the requirements of the subsequent processing circuits.

[0041] The signal then enters the adaptive feedback detection module. This module monitors the frequency components of the input audio signal in real time and analyzes the signal's spectral characteristics using algorithms such as Fast Fourier Transform (FFT). Once feedback frequencies are detected, the detection module immediately identifies these feedback frequency points.

[0042] Next, the adaptive filter automatically adjusts its filtering parameters based on the detected feedback frequency information. It generates a compensation signal at the feedback frequency point that has the same amplitude but opposite phase to the feedback signal. This compensation signal is added to the original audio signal, thereby canceling out the feedback signal and suppressing feedback.

[0043] Finally, the audio signal, after feedback suppression processing, is adjusted by the volume control circuit according to the volume level set by the user through the output volume adjustment knob / AFC bypass switch 10, and then output from the line balanced output interface 17 to the external audio device, providing the user with a clear audio experience free from feedback interference.

[0044] In summary, this adaptive feedback suppressor, through the coordinated operation of its various components, achieves functions such as audio signal input, processing, feedback suppression, and output, providing users with a stable, reliable, and high-quality audio processing solution.

[0045] Adaptive Feedback Suppressor Operation: Startup Phase: When the user presses the power switch 8 on the front panel 7, the power circuit starts working. The external power supply connected to the power interface 16, through the power management module, converts the input power into different voltages required by various components inside the device, such as providing a stable low voltage for integrated circuits and a suitable high voltage for power modules. At this time, the device is powered on and begins initialization. The display 9 lights up, showing the device's initial status information, such as standby mode and default parameters.

[0046] Audio Input Stage: After the device is powered on, audio signals can enter the device through the input interface 12 on the rear panel 11. If a microphone is connected, the microphone converts the sound signal into an electrical signal and transmits it to the input interface 12; if a line-in input device, such as a player, is connected, the audio electrical signal is directly input to the device. The input audio signal is first amplified by a preamplifier to increase the signal strength and meet the requirements of subsequent processing circuits.

[0047] Feedback detection and inhibition phase:

[0048] Feedback Detection: The amplified audio signal enters the adaptive feedback detection module. This module uses algorithms such as Fast Fourier Transform (FFT) to analyze the spectrum of the audio signal in real time. It continuously monitors the amplitude changes of each frequency component in the input signal. When it detects an abnormal increase in the amplitude of certain frequencies, exceeding a preset threshold, it identifies these frequencies as feedback frequencies. For example, in an acoustic environment, if a certain frequency creates positive feedback, the signal at that frequency will continuously amplify, and the detection module can quickly capture this change.

[0049] Feedback Suppression: Once a feedback frequency is detected, the adaptive filter immediately begins operation. It automatically adjusts its filtering parameters based on the detected feedback frequency. Specifically, at the feedback frequency, the filter generates a compensation signal with the same amplitude but opposite phase to the feedback signal. This compensation signal is added to the original audio signal in an adder. Because the two signals have the same amplitude and opposite phase, they cancel each other out, effectively suppressing the feedback signal. This avoids common feedback phenomena in audio systems, such as howling, and ensures the quality of the audio output.

[0050] Parameter setting and adjustment stage: Input level selection: Users can select an appropriate input level, such as LOW, MID, or HIGH, based on the strength of the input audio signal using the input level selection switch 14 on the rear panel 11. Different input devices may output different signal levels. Selecting an appropriate input level ensures that the input signal is within the optimal operating range of subsequent processing circuits, avoiding distortion due to excessively strong signals or sound quality issues due to excessively weak signals.

[0051] Output volume adjustment: Users can adjust the output volume using the output volume adjustment knob / AFC bypass switch 10 on the front panel 7. Rotating the output volume adjustment knob changes the audio signal gain according to the knob's position, thus adjusting the output volume. Additionally, this switch can toggle the AFC bypass function. When the AFC bypass switch is activated, the audio signal bypasses the adaptive feedback suppression module and is output directly, suitable for certain special audio processing needs.

[0052] Display and Monitoring Phase: Throughout the entire operation, monitor 9 will display various operating statuses and parameter information of the device in real time. For example, it will display the input audio level, the currently detected feedback frequency, the output volume, and the on / off status of the AFC function. Users can observe the information on monitor 9 to understand the device's operating status and make appropriate adjustments as needed.

[0053] Audio output stage: After feedback suppression and parameter adjustment, the audio signal is finally output to external audio devices, such as power amplifiers and speakers, through the line-balanced output interface 17 on the rear panel 11. The line-balanced output mode can effectively reduce interference and noise during signal transmission, ensuring that the audio signal is output in a high-quality form, providing users with a clear and stable audio experience.

[0054] Shutdown Phase: After the user completes the audio processing task, pressing the power switch 8 on the front panel 7 again initiates the shutdown process. First, audio signal processing and output cease, then the power supply to each circuit is cut off, the display 9 turns off, and the device stops working. Simultaneously, the heat dissipation process within the casing 1 also stops, and air convection ceases at the ventilation holes 3.

[0055] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. An adaptive feedback suppressor, comprising a housing (1), characterized in that, The outer casing (1) has a side plate (2) on its side, and a ventilation hole (3) is provided on the side plate (2). The outer casing (1) has a Z-shaped clamp (4) inside, and two Z-shaped clamps (4) are symmetrically arranged and clamp the components. A dust cover (5) is provided above the components. A sealing strip (6) is provided on the inner side of the outer casing (1). The front panel (7) is provided on the front side of the outer casing (1), and an elliptical mounting hole (71) is provided on the front panel (7).

2. The adaptive feedback suppressor according to claim 1, characterized in that, A power switch (8) is provided on the front panel (7). The power switch (8) is located on one side of the front panel (7). A display (9) is provided on the side of the power switch (8). An output volume adjustment knob / AFC bypass switch (10) is provided on the side of the display (9).

3. An adaptive feedback suppressor according to claim 1, characterized in that, The rear panel (11) is provided on the rear side of the outer casing (1), and an input interface (12) is provided on the rear panel (11). A power switch (13) is provided on the side of the input interface (12).

4. An adaptive feedback suppressor according to claim 3, characterized in that, An input level selection switch (14) is provided on the rear panel (11), and the input level selection switch (14), the input interface (12), and the power supply switch (13) are located on the same plane.

5. An adaptive feedback suppressor according to claim 4, characterized in that, A configuration interface (15) is provided on the rear panel (11), and the configuration interface (15) is arranged adjacent to the input level selection switch (14).

6. An adaptive feedback suppressor according to claim 5, characterized in that, A power interface (16) is provided on the rear panel (11), and the power interface (16) and the configuration interface (15) are in a certain positional relationship on the rear panel (11).

7. An adaptive feedback suppressor according to claim 6, characterized in that, The rear panel (11) is provided with a line balanced output interface (17), which together with the power interface (16) and the configuration interface (15) form a specific layout on the rear panel (11).

8. An adaptive feedback suppressor according to any one of claims 1 to 7, characterized in that, The Z-shaped clamp (4), dust cover (5), and sealing strip (6) are all located inside the outer shell (1). The front panel (7) and rear panel (11) are located on the front and rear sides of the outer shell (1), respectively, and the components form a relatively fixed position and connection relationship.

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