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  • Joseph Edward Hutchinson 4:26 pm on December 11, 2014 Permalink |  

    Since we were talking about speakers and headphones in class, here is a tip to getting the best ones out there. One thing to consider is how accurately the speakers recreate the sound as it was recorded. The most common way to analyse that is by looking at the frequency response spectrum. The flatter the curve, the more accurately it will recreate the sound. Here is the frequency response spectrum of some popular over/on the ear headphones. I’ll leave you with a question… Are Beats by Dre headphones all they are really cracked up to be?
    graph_compare_dt770_he5le_ultrasone900

     
  • Joseph Edward Hutchinson 12:35 am on November 12, 2014 Permalink |  

    In class a few weeks back I made the comment that the telephone cuts off frequencies outside of a certain range. I had heard that somewhere but I wasn’t sure about a lot of the specifics so I decided to do some research. The telephone actually has a 3,000 Hz frequency bandwidth to allow for long distance calls. Anything below 400 Hz or above 3400 Hz gets cut off. You can compare normal speech to speech through the telephone at this website, http://electronics.howstuffworks.com/telephone6.htm. If you compare the two, you will notice that you can still tell what the person is saying but the timbre is different.

     
    • Lauren Falco 1:44 pm on December 8, 2014 Permalink

      Very interesting, Joe! Thanks for sharing. Another good example of how we don’t need 100% of the information to understand the message.

  • Joseph Edward Hutchinson 12:16 am on October 8, 2014 Permalink |  

    An interesting note about guitar Just because your… 

    An interesting note about guitar. Just because your guitar is “in tune” when tuning the open strings does not mean that your guitar has the correct intonation. What that means is the open note might be in tune but when you play further up the neck, those notes might be out of tune. To properly set up your guitar’s intonation you have to adjust the string length so that all the notes up the neck are in tune. A common way to check this is to see if the 12 fret note and the 12 fret harmonic match. If the harmonic is sharp or flat then you need to adjust the string length accordingly.

     
    • Joseph Edward Hutchinson 12:24 pm on October 20, 2014 Permalink

      Yes, you use the bridge saddles to adjust the length of the string. Different bridges have different types saddles but they all basically let you adjust the length for each individual string. It is usually only a few micrometers but it does make a difference. I recently changed the gauge of strings I use so I had to adjust the string length to accommodate for the new thickness.

    • Lauren Falco 8:08 am on October 14, 2014 Permalink

      This is a good point! I didn’t realize it was possible to adjust the string length on a guitar, though; do you do this by moving the bridge?

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