Mobile Oscilloscope vs 噪声频谱仪

This application turns your phone into a powerful handheld oscilloscope for audio signal analysis (professionals can also use for circuit analysis). The signal parameters can be displayed in detail, including: maximum value, minimum value, average value, effective value and frequency, and the frequency measurement is very accurate. There are multiple trigger modes. The trigger modes are: automatic mode, normal trigger and single trigger; the trigger edges are: rising edge trigger, falling edge trigger, rising or falling edge trigger, jump trigger and differential trigger; the trigger value can be selected. With the measurement function, it is freely measured in the horizontal and vertical directions, gesture operation, easy to use. Waveforms can be freely zoomed with gestures or buttons. Supports interface color selection. Has a storage depth of 10 seconds. This application is normally used for audio signal measurement without any risk. Circuit measurement special instructions: Professionals can use this application for circuit measurements and the electrical signal is input via the microphone channel of the headset. Please pay attention to safety: You must have enough professional knowledge. The high voltage circuit must go through the isolator and attenuator. Conventional low-voltage circuits must also add an attenuator and then enter the phone. Circuit measurement is risky and the author of this application will not be liable for any loss of personnel or equipment resulting from the correct or incorrect use of this application.

噪声频谱仪是一款面向家庭、办公室和设备噪声排查的声学测量工具。 它使用 iPhone 或 iPad 麦克风实时估算 A 计权声级，并提供 60 秒等效连续声级、最高/最低声级、峰值频率、时域波形、FFT 频率成分、时频图、频率密度曲线和频段能量谱。 你可以通过外部声级计输入参考读数进行声级校准，也可以用滑杆调整各图横轴和纵轴范围，观察不同频率成分和相对变化。 未校准时，绝对分贝数仅供粗略参考；频谱形状、峰值频率和相对变化更有价值。本应用不用于执法、验收、职业卫生或其他正式合规检测。