I'm well aware that H is used as a musical note in some countries, the Modern Jazz Quartet taught me that decades ago. If I'm ever in that situation and you don't want to hear it all you have to do is show up 5 minutes late and we will have worked that all out. I deal with mixed units all the time and have no problems with that, sorry that NASA can't handle that. They didn't do such a hot job overseeing the figure of the Hubble space telescope, or tragically the design flaws in the shuttle either. These failures were bad management not sloppy terminology. I do give a hoot when it matters, the name used for the fasteners used to attach a neck to a bass body is not one of those times. Not until you need to replace one and then most people correctly call them screws.