Homework Help: Questions and Answers: Which technology is primarily used in noise-canceling headphones to reduce unwanted ambient sounds?
A) Bluetooth
B) Active Noise Cancellation
C) Passive Noise Isolation
D) Digital Signal Processing
Answer
To solve this question, let’s analysis each of the given options to determine the primary technology used in noise-canceling headphones to reduce unwanted ambient sounds.
Given Options: Step by Step Answering
a) Bluetooth
- Bluetooth is a wireless communication technology used to connect devices, such as headphones to a smartphone or other audio sources. It is not directly responsible for reducing ambient noise.
b) Active Noise Cancellation
- Active Noise Cancellation (ANC) is a technology specifically designed to reduce unwanted ambient sounds. It works by using microphones to pick up external noise and then generating sound waves that are the exact opposite (anti-phase) to cancel out the noise.
c) Passive Noise Isolation
- Passive Noise Isolation relies on physical barriers (like ear cups or earplugs) to block external noise. While it can help reduce ambient noise, it is not a technology but rather a design feature.
d) Digital Signal Processing
- Digital Signal Processing (DSP) is a broad technology used in various audio applications to manipulate audio signals, but it is not specifically used for noise cancellation.
Final Answer
Based on the above analysis, the technology primarily used in noise-canceling headphones to reduce unwanted ambient sounds is:
b) Active Noise Cancellation
Active Noise Cancellation is the key technology used in noise-canceling headphones. It works by using microphones to detect ambient noise, then generating an inverted sound wave that cancels out the original noise, effectively reducing unwanted sounds.
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