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"I RECENTLY SENT YOU A RECORDING FOUND IN MY PARENT'S BELONGINGS AFTER THEIR DEATHS THAT WAS DATED 1945. THE RECORDING WAS MADE IN NEW YORK CITY BY A 19 YEAR OLD YOUNG MAN (MY FATHER) TO SEND TO HIS SWEETHEART (MY MOTHER) BEFORE HE WAS SHIPPED OVERSEAS TO OKINAWA DURING WORLD WAR II. HE WAS IN OKINAWA FOR TWO YEARS (ONE YEAR DURING THE BATTLES ..."

Phon

The unit for measurement of the apparent (subjective) loudness level of a sound. At 1,000 Hz, the phon rating corresponds to the measured sound level. At all other frequencies, a sound level which – to the listener – seems to be of the same loudness as the 1,000 Hz tone, is given the same phon rating, regardless of the actual measured sound level.Phase shift, equalizer — The phase shift introduced in a signal path by the insertion of equalization.