The Standard Reference Sound Level Is About

question 67

Multiple Choice

The standard reference sound level is about:

• A)the threshold of human hearing at 1000 Hz
• B)the threshold of pain for human hearing at 1000 Hz
• C)the level of sound produced when the 1 kg standard mass is dropped 1 m onto a concrete floor
• D)the level of normal conversation
• E)the level of sound emitted by a standard 60 Hz tuning fork

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Definitions:

Norepinephrine

A neurotransmitter and hormone important in the regulation of blood pressure, sleep, alertness, and mood.

GABA

Gamma-Aminobutyric Acid, an inhibitory neurotransmitter in the brain that helps regulate neuronal excitability and plays a key role in reducing anxiety and promoting relaxation.

Two-Factor Theory

The most influential theory of fear and phobias during the 1960s and 1970s. The model proposed that fears are acquired by classical conditioning, but maintained by operant conditioning.

Little Albert

The subject of a famous psychology experiment by John B. Watson which demonstrated that emotional responses could be conditioned in humans.