|
所在平台: Udemy |
课程主页: https://www.udemy.com/course/1k0-002-cve-2-certified-practice-exam/
课程评论：没有评论
Coursera 上的 1K0-002 CVE- Certified Practice Exam 课程主要是一套用于认证的实践考试，旨在检验学习者在音视频会议技术领域的知识和技能。 课程内容涵盖了多个关键技术概念，例如： * **自动增益控制 (AGC)**：理解 AGC 如何调节音量以优化音频清晰度，例如调整远端麦克风的音量。 * **混响与回声**：区分混响（短促、扩散的声学反射，会持续一段时间）和回声（清晰、独立的声学反射），以及它们对会议音频的影响。 * **房间增益 (Room Gain)**：了解房间增益的概念，即在特定房间内，麦克风相对于“自由场”环境的灵敏度差异，以及它在声学回声消除中的作用。 * **幻象电源 (Phantom Power)**：识别音频设备常用的幻象电源技术，常见的如 XLR 连接器上的 48V DC 电源，用于为麦克风等设备供电。 * **麦克风混音器功能**：明确麦克风混音器能够执行的功能，如调整不同麦克风的相对增益、将麦克风信号转换为线路信号，以及提供幻象电源。同时，也指出混音器不具备的功能，例如调节视频显示亮度或房间声学特性。 * **H.323 媒体网关**：理解 H.323 终端在通过媒体网关呼叫 ISDN 站点时，需要遵循的注册要求，例如必须先在网守 (Gatekeeper) 注册。 该课程内容侧重于实际应用和技术细节，为考生准备相关认证考试提供了一个良好的实践平台。
Sample Questions:What does Automatic Gain Control (AGC) do?It turns down the volume to the far-end microphone.It turns up the volume to the far-end microphone.It builds the volume to the near-end microphone.It selects among multiple microphones.Which of the following correctly describes reverberation and echo?Reverberation is long, distinct, acoustic reflections.Reverberation is irrelevant to conferencing audio.Echo is a coherent, distinct carry-on of sound.Echo is short, diffuse, acoustic reflections that linger after the original sound has stopped.Reverberation is an incoherent, diffuse, carry-on of soundWhich of the following accurately describes room gain as it applies to acoustic echo cancellation?Relative sensitivity of the microphones expressed in dB versus the same microphone in a "free field" environmentRelative perceived loudness of a person speaking in a given room versus the same person speaking in an anechoic chamberRatio of loudness of the participants voices versus the loudspeaker volume arriving at the microphoneMeasure of amplifier power driving the loudspeakers in a given conference roomWhich of the following correctly describes typical audio phantom power?12 volts DC applied to the tip and ring of a TRS connector used to power amplified headphonesA DC voltage applied to pins 2 and 3 of an XLR connector returning through pin 1, used to power microphonesA DC voltage applied to the center pin of an RCA type connector used to power remote pre- amplifiers48 volts DC applied to a telephone circuit center pair used to provide power to the telephone setWhich of the following functions can NOT be performed by a microphone mixer?Provide phantom power to microphones.Provide a means to adjust the relative gain of different microphones.Provide gain to convert mic-level signals to line-level signals.Provide a means to adjust the video display brightness.Provide a means to adjust the room acousticsThe H.323 Media Gateways require H.323 Terminals, which wish to make calls through the Gateway to ISDN sites, toperform a test with the other H.323 Terminals first.be registered with the Gatekeeper first.be using a Gatekeeper Prefix defined on the End Point.be using a Gateway Prefix registered on an Active Gatekeeper.be registered with the MCU first.call the Network administrator first.
