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Amplification

Amplification: Arrival of troop buildup from Germany, 1906

Arrival of troop buildup from Germany, 1906

Amplification: HER MASTER'S VOICE!

HER MASTER'S VOICE!

Amplification: Man with huge megaphone

Man with huge megaphone

Amplification: Woman in suit at microphone

Woman in suit at microphone

Amplification: Philco Radio phonograph with AM and FM radio and

Philco Radio phonograph with AM and FM radio and

Amplification: Portrait of man with ear to microphone

Portrait of man with ear to microphone

Amplification: Father with baby in speaker horn of an old radio

Father with baby in speaker horn of an old radio

Amplification: Father with baby in speaker horn of old radio

Father with baby in speaker horn of old radio

Amplification: Father with baby in speaker horn of old radio

Father with baby in speaker horn of old radio

Amplification: Advertisement for a Music Shop in Vienna, Austria

Advertisement for a Music Shop in Vienna, Austria

Amplification: Soldier listening through Bolling Field's amplifier

Soldier listening through Bolling Field's amplifier

Amplification: Richard H. Ranger American electrical engineer

Richard H. Ranger American electrical engineer

Amplification: Sound engineer Harry Proodian testing microphones

Sound engineer Harry Proodian testing microphones

Amplification: President Coolidge with a loud-speaker equipped

President Coolidge with a loud-speaker equipped

Amplification: Argon Ion Laser Reflecting a Beam Via Mirrors

Argon Ion Laser Reflecting a Beam Via Mirrors

Amplification: Male Cheerleader Speaking into Large Megaphone

Male Cheerleader Speaking into Large Megaphone

Amplification: Woman with megaphone and huge football

Woman with megaphone and huge football

Amplification: Allied anti-aircraft listening device which amplified

Allied anti-aircraft listening device which amplified

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