What is the difference between passive noise cancelling and active noise cancelling?
In the modern world full of sounds, it is essential to understand how to reduce unwanted noise for an optimal listening experience. Two commonly used methods are active noise cancelling (ANC) and passive noise cancelling (PNC). But what is actually the difference?
Published on: 15 november 2024
What is active noise cancelling?
Active noise cancelling (ANC) is a technology that actively suppresses unwanted ambient sounds. This is done by built-in microphones that detect external sounds and then generate an opposite sound wave to neutralize these sounds. This technique is particularly effective in reducing constant, low-frequency sounds such as the hum of airplane engines or air conditioning.
What is passive noise cancelling?
Passive noise cancelling (PNC), also known as sound isolation, uses physical barriers to block external sounds. This is achieved through the design and materials of the headphones or earbuds, such as thick ear cushions or well-fitting earbuds that seal your ear. This way, they dampen the ambient noise and less sound reaches your eardrum. Passive noise cancelling is more effective in dampening higher frequency sounds, such as voices.
What is the difference between passive noise cancelling and active noise cancelling?
The main difference between passive noise cancelling and active noise cancelling lies in the way they reduce sound:
- Technology: Passive noise cancelling relies on physical isolation through materials and design, while active noise cancelling uses electronics and microphones to create anti-noise that actively suppresses unwanted sounds.
- Effectiveness: ANC is generally more effective in reducing all sound frequencies, because in addition to design, it also uses technology to actively dampen sound.
- Energy consumption: Because ANC uses active electronics, it requires a power source and can affect the battery life of your earbuds or headphones. Passive noise cancelling does not need power.
- Cost: Due to the more complex technology and additional components, ANC devices are often more expensive than PNC devices.
Which type of noise cancelling suits you?
The choice between active noise cancelling and passive noise cancelling depends on your personal needs and the environment you are in:
- Travel: If you often travel by plane or train, an active noise cancelling headphone can be useful to reduce the constant hum of engines.
- Work: Do you work in a busy office with a lot of conversations around you? Active noise cancelling earbuds help you concentrate better.
- Budget: If you are looking for a cheap(er) solution without worrying about battery life, passive noise cancelling may be the better choice. Look for an over-ear headphone, the ear cushions surround your ears and thus dampen external sound.
