Set of records
A set of 11 records for use with the record player. The first 10 seem to be specifically made for scientific use, while the 11th is just normal music. Additionally, the 11th record is not listed in the index at the front of the album, meaning it was likely added at a later date.
1: Band Music, High Frequencies Suppressed
2: Band Music, Low Frequencies Suppressed
3: Music and Speech w/ High or Low Frequencies Suppressed
4: Music and Speech w/ High and Low Frequencies Suppressed
5: Music and Speech of Varying Intensities
6: Instrumental and Vocal Tones
7: Piano, Cello, and French Horn w/ High Frequencies Eliminated
8: Echoes of Speech and Music
9: Phase Distortion in Speech
10: Measuring Noise
11: Music by Bob Crosby (likely not a part of the original set)