如题，我有一台宝峰UV5RHPro，只要一掐PTT键我的电脑耳机就会嗡嗡作响，耳机是金士顿飓风2。有没有人懂这是什么原理，新人求教

我觉得是谐波和杂散。谐波：基础频率的整数倍。如50Hz的整数倍，100Hz、150Hz。杂散：杂散（Spurious Emissions）是指在必要带宽之外的一个或多个频率上的发射，其发射电平可以降低而不影响信息的传递。我觉得杂散的同时也同时产生谐波。比如宝锋5RH Pro发射频率在435Mhz，杂散产生在400Mhz左右。在2.4G左右存在杂散的谐波。金士顿HYPERX 飓风无线的无线技术：基于2.4GHz无线连接技术，降低音频传输延迟，提供稳定信号。这个宝锋5RH Pro在2.4G左右产生的杂散谐波可能就是造成电脑耳机就嗡嗡作响的原因。要改变这种情况。建议尝试调节宝锋5RH Pro的发射频率，比如同频段调整发射频率或U段改V段再试按下PTT。或者把宝锋5RH Pro的发射功率调整到低档发射试试。

@"arwoon"#p88890 但是我好像说漏了几点，第一我这个是有线耳机，没有无线的功能，我猜可能是手台的功放原件干扰到了耳机的功放，但是不知道对不对；第二我发现这个问题只在V段会出现，U段就没有了

2000年左右用过800M GSM 网络的手机的老头子们都知道。当耳机开始有节奏嗡嗡响的时候，要么是短信，要么是电话来了............. 还有一首SHE的《RingRingRing》结尾.......很明显的嗡嗡嗡🙃

@"BG7NQF"#p88899 写错了，是歌曲《RingRingRing》开头《借口》结尾，都可以听到手机干扰的那种嗡嗡声

@"BG7NQF"#p88901 还真的是。

可能是和什么元件互相作用起到包络解调的作用了，很多东西都有这个效果，比如电弧：https://www.bilibili.com/video/BV1UC4y1s7iD

@"BI1XJT"#p88912 从视频以及楼主的耳机来看怎么感觉像是矿石收音机（有耳机、有电线）接收PTT信号

显示器、音响、台灯、都碰到过被干扰的情况，最好笑的一次是我跑到卫生间窗户那里通联，小米洗手的机器直接被干扰的开机吐泡泡。。。

@"BI1XJT"#p88912 我猜测·，像无处不在的“电容”（电路板上的分布电容）和“二极管” （每个ic 管脚上都有的上下保护二极管）完成了检波这个作用吧

我ppt，唯一问题的就是我的电脑漫步者音箱就响

Why does my computer's headphones start buzzing when I press the PTT (push-to-talk) button on my handheld radio?

BG5GGB

As the title suggests, I have a BaoFeng UV5RHPro. As soon as I press the PTT key, my computer headphones start buzzing. The headphones are Kingston Hurricane 2. Does anyone know what this is caused by? Newbie asking for advice.

arwoon

I believe it's due to harmonics and scattering.
Harmonics: Integer multiples of the fundamental frequency. For example, multiples of 50 Hz such as 100 Hz and 150 Hz.
Spurious emissions: Spurious emissions refer to transmissions on one or more frequencies outside of the necessary bandwidth, where the transmission power can be reduced without affecting the transmission of information.
I believe that, in addition to the main signal, harmonics are also generated due to scattering. For example, the 5RH Pro transmitter by Baofeng operates at a frequency of 435 MHz, and scattering produces harmonics around 400 MHz. There are also harmonics caused by scattering at approximately 2.4 GHz.
Kingston HYPERX Tempest Wireless wireless technology: Based on 2.4 GHz wireless connectivity, reduces audio transmission latency and provides a stable signal.
The extraneous harmonics generated around 2.4 GHz by the BaoFeng 5RH Pro radio may be the cause of the buzzing sound in your computer's headphones.
To change this situation, I recommend trying to adjust the frequency of the BaoFeng 5RH Pro radio. For example, try adjusting the frequency to the same band or switching from U-band to V-band and then pressing PTT. Alternatively, you can reduce the transmission power of the BaoFeng 5RH Pro to a low setting and try transmitting again.

BG5GGB

arwoon However, I think I may have mentioned a few things incorrectly. First, I am using wired headphones, not wireless ones. I suspect that the amplifier in my headset might be interfering with the headphone's amplifier. But I don't know if this is true. Second, I only noticed this problem when using the V-band; it doesn't occur in the U-band.

BG7NQF

Older generations who used phones with 800MHz GSM networks around the year 2000 would know this. When you start hearing a rhythmic buzzing sound in your headphones, it's either a text message or a phone call.
There's also a SHE song called "RingRingRing" that ends with... a very obvious buzzing sound.🙃

BG7NQF

BG7NQF The correct sequence is: the beginning of the song "RingRingRing", followed by the ending of "借口" (Jie Kou), where you can hear that buzzing sound similar to mobile phone interference.

BI9AAE

BG7NQF Indeed, it really is.

BH2XWP

BG7NQF 我一直以为《RingRingRing》开头是手机震动

BI1XJT

It's possible that it's interacting with certain components to achieve envelope detection, which many things can do, such as an electrical arc.https://www.bilibili.com/video/BV1UC4y1s7iD

arwoon

BI1XJT Based on the video and the user's headphones, it seems like a miner's radio (with headphones and a cable) is receiving PTT signals.

BG7NQF

BI1XJT I suspect that components like the ubiquitous "capacitors" (distributed capacitors on circuit boards) and "diodes" (protection diodes at each IC pin) are likely responsible for performing the rectification function.

BG6QFO

I've experienced interference with displays, speakers, and lamps before. The most amusing incident was when I went to the bathroom window to troubleshoot, and Xiaomi's hand-washing machine directly started making bubbles due to the interference.

BG8KUQ

In my presentation, the only problem I encountered was that my laptop's speakers were not working.

BG5TOX

This is an issue between the radio's EMI and the EMS for computers and headphones.
This is collectively referred to as EMC.

BG2EFX

While you're enjoying FT8, you might also notice things like: one transmitter turning off, the display going blank, a USB cable disconnecting, the computer restarting, and streetlights flickering below.

BI3ATV

BG2EFX When I'm launching at 15m 10m, the screen goes black.

troilus

Wrap a magnetic ring on-line.

BA4RRE

I once encountered a charger that directly boosted from 5V to 14V, which caused my desk fan on the table to burn out.

BI4MKU

When I launch a program, the webpage displayed on my computer automatically scrolls down.

BG2EFX

BI3ATV The display's EMC protection is inadequate. Of course, the radio's EMC protection is also not very good. And of course, if you use different antennas and shorter cables, it's simply impossible.

BI3ATV

BG2EFX Okay, I'm having some trouble with my current setup. The MA01 antenna seems to be causing issues. I'm planning to try a different antenna to see if that resolves the problem.

BI4OAE

Abbreviated form (two characters) Interference

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