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Nowadays, microphones are widely used in our daily life. When we are speaking to somebody through our smartphones, microphones are the bridge that collects and transmits our sounds. When we are recording videos, microphones are also working to make sound completely recorded. And when we are giving an instruction to some smart devices with the voice interactive system, microphones also plays a role in helping commands correctly executed. In conclusion, microphones are crucial to the usage of electronic devices and the choice of microphone technology is more critical than ever.
However, when using some microphones, there are always distortion and unclarity of sounds, which results in great inconvenience on our daily life. In order to avoid such situations, E360 dash cam adopted the digital silicon microphone to enhance the sound effect. As a game-changing solution, digital silicon microphones provide superior performance and versatility compared to traditional microphone options. The ability to capture a wide range of sound levels, resist distortion, and improve overall audio clarity makes digital silicon microphones ideal for various applications.
What is digital silicon microphone?
In order to better understand digital silicon microphone, we have to learn some things about MEMS microphones. A MEMS microphone is a microphone that is produced using micro-electromechanical systems processing techniques. These mics are effectively etched into a semiconductive silicon wafer. A pressure-sensitive moveable membrane (diaphragm) is etched behind a stationary perforated plate. The perforated stationary plate and the diaphragm act together to form a capacity. Most include amplification circuitry with analog or digital outputing.
Digital silicon microphone is a kind of MEMS microphone with digital output, which utilizes silicon-based microphone as the core. Typically, digital silicon MEMS microphones are more suitable for designs where the host is a microcontroller (MCU) or a digital signal processor (DSP). Digital MEMS microphones also offer better noise immunity, bit error tolerance, and a simple hardware interface. And it has been widely used in consumer electronics, smart home, communication equipment and other fields by the virtue of its unique advantages.
How does a digital silicon microphone work?
So now that we know the basics of what a digital silicon microphone is, it's time to look into how it works.
MEMS microphone comprises a flexibly suspended diaphragm free to move above a fixed backplate and is fabricated on a silicon wafer. When a sound pressure passes through holes in the backplate, it causes the diaphragm to move in proportion to the sound wave’s amplitude. The movement varies the distance between the diaphragm and the backplate, and that varies the capacitance. Here, an analog-to-digital converter (ADC) converts the change in capacitance into a digital signal.
In order to better understand the working principle, we can simplify it into four steps:
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Capture Sound wave: The silicon film inside the microphone senses the change of sound waves and generates tiny electrical signals.
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Amplify and process signal: Through thebuilt-in amplifier and signal processor, the captured signal is amplified and processed to eliminate noise and distortion.
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Digital conversion: The processed analog signal is converted into a digital signal by an analog-to-digital converter (ADC).
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Output: Finally, the digital signal can be output through interfaces such as I2S and PDM, which is convenient for subsequent data processing and analysis.
Digital Silicon Microphones VS Analog Microphones
What are Analog microphones? Actually, you can find them in many familiar things, such as sound equipment and recording devices. However, unlike digital silicon microphones, analog microphones are based on circuit design, which requires external amplification and processing circuits to handle and interpret the audio signal. So, nowadays, the digital silicon microphone are much favored by modern devices due to its remarkable performance on acoustics.
There are some significant differences between them.-
Output type
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Processing
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Size
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Power efficiency
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Application
Digital silicon microphones are widely used in smartphones, tablets, smart speakers, and any application where digital signal processing or minimal power consumption is required. And analog microphones are commonly used in professional audio equipment, musical instruments, public address systems, older consumer audio devices, and environments where signal integrity can be managed with short distances and clean conditions.
The choice between digital silicon microphones and analog microphones depends on the specific application requirements, including size, power consumption, ease of design, and whether digital processing is needed.
So, taking all features that a practical dash cam is required to have into consideration, a dash cam equipped with digital silicon microphone is supposed to be our first choice.
The benefits of using digital silicon microphones on E360 dash cam
Aiming to achieve the optimal sound quality of dash cams, Vantrue adopted digital silicon microphone on E360 dash cam, making E360 a practical device for every driver. Due to the superiority on performances of digital silicon microphones, E360 dash cam are more high-efficient on recording and remarkable on functions.
And there are details about the benefits of using digital silicon microphones on E360 dash cam.
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Strong antijamming capability for more real voice
Digital silicon microphones often incorporate built-in noise-cancellation features, improving clarity and reducing background noise, and this feature plays an important role in sound collection whether driving or parking your car. If you are trying to record a road trip with your family, the digital silicon microphone allows for a clear voice recording without noise from other driving cars, making every warm family moments clearly recorded. More importantly, when you are involved in a car accident, the powerful antijamming capability of the digital silicon provides more real surrounding voices to better reconstruct the accident, offering the issue of liability in the event a better solution. Apart from those advantages that ensure comfortable experience in the car, the outstanding superiority on out-car recording is also impressive. With a extra handheld mount and a tripod stand, the camera of E360 dash cam is able to stand stably on a flat surface to record a meeting , which can clearly record every important words and sentences of the meeting.
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High sensitivity to sound for efficient voice control
Digital silicon microphones can capture a wider range of sound levels, ensuring that both soft and loud sounds are recorded clearly without distortion. And in order to make sound collection much efficiently, the digital silicon microphone of E360 dash cam is positioned centrally at the camera’s bottom. Besides, the design features 24 microphone holes on the front and 24 on the bottom, creating a symmetrical acoustic and aesthetic layout. All of these innovative features allow our commands, like taking photo and muting/unmuting the microphone, to be clearly and quickly captured and executed by E360 dash cam.
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Low-power high-efficiency
Are you still worrying about the battery consumption of your dash cams? Digital silicon microphones can relieve your anxiety of it. The digital silicon microphones typically consume less power because of its compact design, which is especially important in battery-powered or low-power dash cam systems. This feature also ensures a high-efficient operating performance on parking modes of dash cam, which can record some notable voices with low power consumption, offering you a wonderful usage experience.
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Better connectivity to intelligent devices
Digital microphones can easily interface with modern digital signal processors (DSPs) and microcontrollers, facilitating the implementation of advanced features such as voice recording, real-time audio analysis, and data transmission to cloud services. Therefore, operations like checking surveillance videos, downloading complete videos and interacting in real time through smartphones or computers are allowed to be conveniently finished.
Conclusion
Incorporating a digital silicon microphone into Vantrue E360 dash cam significantly enhances audio recording capabilities, reliability, and overall performance. This technology adopted by E360 dash cam not only ensures clear and high-quality sound capture but also supports advanced functionalities that can improve the user experience and add value to the dash cam’s overall feature set. As dash cams continue to evolve, the integration of such digital technology will remain an essential aspect of their development.
Frequently Asked Questions
Do all dash cams record sound?
Yes, all dash cams have the capability to record not only video footage but also audio. This feature is useful for capturing crucial details like conversations or sounds during incidents on the road. For instance, in the event of an accident, this dash cam audio can provide additional context and evidence about what happened.
If I don’t want to be recorded, how can I turn the microphone off?
The voice recording feature is enabled by default on most dash cams. If you wish to avoid being recorded in certain situations, you can access the settings to disable it or issue a command via voice control.
What are the differences between digital silicon microphones and traditional microphones?
Traditional microphones are based on circuit design, which requires external amplification and processing circuits to handle and interpret the audio signal. While the digital silicon microphones utilizes analog-to-digital converter (ADC) to process, which enables advanced features like noise cancellation, filtering, and dynamic range optimization directly within the microphone.
