Weird noise

[dirtyjersey]

So I was ripping the one wheel this am not gonna lie I usually wear some headphones but forgot em ... So I started hearing a waam waam waam noise I know I wasn't going full speed so I checked the app the noise started around 15mph any idea what it can be I'll try to get a GoPro near the wheel to get the sound

[njcustom]

@dirtyjersey it does make noise at higher speeds.. need to hear it to confirm what it is..