hi! any idee why I get these overrun and underrun errors?

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pi@raspberrypi:~ $ arecord -D plughw:1,0 -f dat | ssh -C pi@192.168.1.153 aplay -f dat
Recording WAVE ‘stdin’ : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
pi@192.168.1.153’s password:
overrun!!! (at least 4943.391 ms long)
Playing WAVE ‘stdin’ : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
underrun!!! (at least 268.066 ms long)

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I am streaming from a Logitech USB camera + RPi + Wifi (192.168.1.154) to another RPi + Wifi (192.168.1.153). I am also hearing delays in the audio transmission