Audio
The main reason this page was created was to get these passive speakers I found on the ground to work. It has lead to a larger development into the topic :).
Audible Range
Hearing range describes the frequency range that can be heard by humans
- human hearing range: 20 - 20,000 Hz
- however, high pitches get harder to hear as we age
- a basic measure of hearing is afforded by an audiogram
- involves tones being presented at specific frequencies (pitch) and intensities (loudness).
Audio Characteristics
Characterized by parameters
- bandwidth
- nominal level
- power level in decibels (dB)
- voltage level
Signal paths are either
- single-ended
- balanced
Digital Audio Signal Transfer Methods
- optical fiber
- light waves sent through plastic tube
- coaxial cable
- ground/negative surrounding positive
- or, twisted pair cable
- positive and negative in separate lines