YouTube

sign up forgot login?
search for these words:
limit on this user:
    
Supverse
Filtered on: #440Hz > showing 1 comment covering 100 days


Arts
Business
Computers
Games
Health
Home
Recreation
Science
Society
Sports

In addition, fixing notes to standard #frequencies (required for instrument makers) has varied as well. #ConcertA was set at 435 Hz by France in 1859 while in England, concert A varied between 439 and 452 Hz. A frequency of #440Hz was recommended as the standard in 1939, and in 1955 the International Organization for Standardization affirmed the choice. #A440 is now widely, though not exclusively, used as the A above middle C.
&neo 2013-10-17  


screenshots generated by page2images | Site Snapshot by PagePeeker | raw sentiment and classification data by uClassify | copyright 2014-2019 DYNO3 LLC | Terms of Use and Privacy Policy