FERRANTI
A F-3
INTERVALVE
FERRANTI
RATEMESPNO
TRANSFORMER
, ৯
BRITISH MADE
CURVE
AVERAGE FEMALE SPEAKING YO:CE.
HARMONIC RANGE.
PIANOFORTE.
CELLO.
VIOLA.
-A.F.3 TRANSFORMER
AVERAGE MALE SPEAKING VOICE.
CLARIONETTE..
CORNET
VIOLIN
OBOE.
FLUTE.
HUMAN
HORN.
VOICE.,
36
54
32
30
28
26
24
20
14
12
10
WITH D.E.R. VALVE
ICURVE II = AF 3 TRANSFORMER
CURVES IV y & OTHER TRANSFORMERS
4.
S00
2000
4000
60 00 800
Frequencu per Seccnd
MUSICAL FOREGROUND.
FUNDAMENTAL RANGE OF
MUSICAL MIDOLE DISTANCE.
MUSICAL BACKGROUND.
FUNDAMENTAL RANGE OF SINGING,
CHIEFLY OVERTONES OF
SPEECH AND MANY
INSTRUMENTS. AND OVERTONES OF
SPEECH
SING NG
INSTRUMENTS.
LOWER INSTRUMENTAL NOTES.
INSTRUMENTS.
The Mearsure
of Merit
EVERY WIRELESS ENTHUSIAST KNOWS
THAT THE AMPLIFICATION CURVE ON
THE MUSICAL SCALE IS
Amplification Ratio
