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Audio Spectrum

Dies ist der erste Artikel in der Reihe Wissenschaft / Technik.
Da wir professionell mit Audiomaterial im Sprachunterricht arbeiten und oft Audio-Dateien
aus eigener Produktion verwenden - haben wir in diesem Artikel einige interessante Fakten
über Computer-Audio und dessen Wahrnehmung in diesem Artikel zusammengefasst.
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Audio Spectrum Example

 

Englisch

What is Audio Spectrum?

What is audio spectrum?

The audio spectrum refers to the range of frequencies that make up sound waves.
It's a way to describe the different components of an audio signal and how they
contribute to its overall quality and character. The human ear can perceive sounds
within a specific frequency range, typically considered to be:

* 20 Hz: The lowest frequency that humans can hear (a very low rumble or vibration)
* 20 kHz: The highest frequency that humans can hear (an extremely high-pitched sound)

However, it's worth noting that some people may be able to perceive frequencies
outside of this range, such as those with perfect pitch or individuals who have been
exposed to sounds beyond 20 kHz.

The audio spectrum is often divided into different frequency ranges, which can help
identify the characteristics of a sound. Here are some common categories:

* Low Frequencies (20 Hz - 200 Hz)
* Mid-Frequencies (200 Hz - 2000 Hz)
* High Frequencies (2000 Hz - 20 kHz)

Audio Spectrum Analysis:

To analyze the audio spectrum, audio engineers and musicians use various techniques:

Spectral display: a graphical representation of the frequency content of an audio
signal. Frequency response analysis: measuring the way an audio system or component
affects different frequencies. Spectrum measurement tools: software and hardware
devices that provide detailed information about an audio signal's frequency
characteristics.

Applications:

Understanding the audio spectrum is crucial in various fields. Audio production:
creating music, sound design, and mixing. Audio engineering: setting up audio systems,
adjusting frequency responses, and troubleshooting issues. Music education:
teaching students about musical intervals, harmonics, and resonance.

We hope this helps you understand the basics of the audio spectrum!


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Audio Noise Definitions

Audio Noise

Dies ist der zweite Artikel in der Reihe Wissenschaft / Technik.

 

Englisch

What is Audio Noise?

Audio Noise Definitions:

* White noise: Even distribution across all frequencies
* Pink noise: More power in lower frequencies (20 Hz - 200 Hz)
* Brown noise: Most energy concentrated in very low frequencies (10 Hz - 100 Hz)
* Blue noise: Most energy concentrated in higher frequencies (200 Hz - 20 kHz)
* Black noise: No energy in any frequency range (essentially silent)

White noise is a type of noise that contains all audible frequencies at the same intensity,
creating a flat power spectral density. In other words, it's a mixture of different sound
frequencies that are all at the same level, resulting in a uniform, even sound.

Examples of white noise include:

Radio static: The hissing or crackling sound you hear when there's no radio signal.
Fan noise: The steady hum of an electric fan or air conditioner.
Rainfall: A continuous, evenly distributed sound of raindrops hitting the roof or ground.
Ocean waves: The soothing, constant crash of ocean waves on a beach.

White noise is often used for:

Sleep aid: To help people fall asleep or stay asleep by blocking out other distracting sounds.
Focus and concentration: To create a consistent background sound that helps mask other distractions.
Relaxation: As a calming and soothing sound, white noise can be used to reduce stress and anxiety.

Pink noise is a type of noise that has a frequency spectrum similar to white noise,
but with more power in the lower frequency range. This means it sounds like a gentle
rustling or soft rumble, often used for relaxation and sleep.

Key characteristics of pink noise:

More low-frequency emphasis: Unlike white noise, which contains equal amounts of high-
and low-frequency sound, pink noise has more energy in the lower frequencies (20 Hz to 200 Hz).
Softer and more gentle: Pink noise is often described as a softer, more soothing sound
compared to white noise. Similar frequency range: Like white noise, pink noise typically
spans the entire audible frequency spectrum (20 Hz to 20 kHz).

Examples of pink noise include:

Gentle ocean waves: The sound of soft, rolling waves on a beach.
Rainfall: A softer, more gentle version of rain compared to the sharper, higher-pitched
white noise equivalent. Thunderstorms: A gentle, distant rumble of thunder on a calm day.

Pink noise is often used for:

Sleep aid: As a calming background sound that can help people fall asleep or stay asleep.
Relaxation and stress relief: To create a peaceful atmosphere and reduce anxiety.
Focus and concentration: To mask distracting sounds and improve productivity.
Tinnitus management: Some research suggests pink noise may be beneficial in reducing
the symptoms of tinnitus (ringing or buzzing in the ears).

In contrast to white noise, which can be more piercing or jarring, pink noise is generally
considered a more pleasant and soothing sound.

 

 

 

 

 

 

 

 

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