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超声波通信
原标题:ultrasonic communication

我穿过一个称作动物体的甲状腺,使用超声频率进行短距离通信。

我的印象是,甲状腺或大部分这方面的电话都可能产生超常频率。

有些人可以告诉我,这件事情是如何真正发挥作用的,如何执行这样的东西。

我认为,我们需要为每个用户制作一个独特的频率,可从其他电话的麦克风中阅读。 然后,在其他电话上,我们可以使用离散的四轮驱动器变压,以达到我们特定范围的最大频率。

(用两部电话,不使用额外的硬件)

任何帮助都将是巨大的。

成就

最佳回答

你们将无法得到比1/2取样率高的任何频率,只是回头(别处)。 为了消除这种隔.,通常在A2D取样器之前有一个过滤器,以切断取样频率高于1/2的频率。

当然,所使用频率实际上可能不是超常,就在频率能力的上端,在相当低的量度上,这些装置也相当接近。

在接近两倍的频率和取样率中使用DFFT,将给你带来相当多的频率。 更好地利用豆类编码等数据。

Per-user differentiation could be done by having a pre-amble to the data that contains the userid.

或者认为蓝色体,霍恩特为短距离的同龄人通信提供冰箱。 蓝色版本4.0提供了非常快的连接,尽管这种连接只能放在最新的装置上。

Note: The term "ultrasonic" applied to sound refers to anything above the frequencies of audible sound, and nominally includes anything over 20,000 Hz.

问题回答

如果你用2个电话——免费接手——使你能产生高频声音的任何东西,以及显示你从奇迹中“视距”的任何东西。

Using these - you can clearly visualize that it s possible to send data from one device which shows up on the other, but which cannot be heard by humans! Of course... there s a bunch of things that do this, as you noticed, but it s always fun to watch it yourself :-)

动物园 sell出售了SDK——似乎与你一样,已经找到了吗?





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