Tag: hard bass sound effect

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Is bass important in audio? Part 3

Does sound control sound? Masking effect

In a lively restaurant, the voices around you can be loud and the conversation can be difficult to hear.
This phenomenon of making another sound difficult to hear is called “masking.”
The closer the frequency of the sound you want to hear and the frequency of the disturbing sound, the greater the masking effect, that is, the more difficult it is to hear.
Also, the effect of masking low tones, albeit slightly, is greater than the effect of masking high tones to low tones.
Even in audio, if you suppress the bass, you may hear the midrange and high-pitched sounds that you couldn’t hear before.
Opera singers who sing with the orchestra in the background and voices leading metal bands must have the power to overcome this masking.

Cocktail effect to select and listen to the sound you want to hear
Cocktail effect image
Along with masking, I would like to refer to the “cocktail effect”, which is the mechanism of the human body that works against masking.
Even if the environment is a bit noisy, humans have the ability to selectively hear the sounds they want to hear.
For example, voices of the opposite sex that are a cause for concern at parties can be heard well, and classical and violin solos can be heard well even with small sounds because we are unknowingly concentrating on listening.
The pattern that is easy to distinguish in the cocktail effect is when the sound you want to hear and the disturbing sound come from different directions, or when the sound you want to hear and the disturbing sound change the patterns differently.
Human hearing can make the sound you want to hear emerge from the background sound and you hear it emotionally.

Sound method
The human ear has the ability to know where sound is coming from.
Most animals have two ears, but the delicate time difference and intensity at which sound is transmitted from one side to the other determines where the sound is transmitted.
In other words, when the sound comes from the direction in which it comes first and the direction in which the sound is loud, a slight difference is detected.
By the way, it seems that the sound that is transmitted from the right and the left is even positioned in front of and behind you and the sound that you hear often changes depending on the range.

Additionally, the way visuals are heard will also be affected by sound.
When the main character is speaking in a movie, the illusion is that the actual sound is coming from the side speaker but can be heard from the front.

An audio experience that takes advantage of the treble, midrange and bass characteristics!
Even beginners can easily compare the midrange.
The vocal singing voice is generally in the mid-range 300 to 3000Hz, which is a range that is easy for humans to hear, and it is a rich range that plays a central role in music. It is easy to understand how the speaker expresses
this mid-range listening to the vocal standard.
If the soprano’s voice can be heard softly, the thickness of the tenor, if there are strange habits or distortions, or the human senses are ambiguous, it is a way of listening and comparing by holding down the dots and attaching listening notes.
The reproducibility of mid-range voices is an important part where you can feel what the audio ensemble is looking for, be it a warm tone or a clear and transparent tone.
If you like classical music, pay attention to how you listen to the violin and piano.
The violin has a smooth sound and the piano has a tapping sound.
Whether these two sounds are natural or harmonious is a characteristic of the speaker.

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Is bass important in audio? Part 2

The voices and sounds of the musical instruments that we make are not a single sound, but a combination of multiple pure tones.

Everyday sounds heard by superimposing pure tones are called “compound sounds.”
The decomposition of a complex sound with a complex waveform produces a pure tone.

On the other hand, “noise”, which is avoided even in audio, is one of the types of sound.
The noise waveform is a completely random and chaotic waveform.
When buying new audio, some people may adjust it to white noise or pink noise when you keep the sound flowing for a long time as you age to get used to the high and low frequencies.
White noise is noise with the same energy in all frequency bands.
Pink noise is white noise that passes through a -3dB / oct LPF and is inversely proportional to the pitch (frequency) of the sound.
It is often used to measure sound because the sound gets smaller as the sound gets louder.

However, this noise is also an element that enriches the music.
The GAIN (distortion) of a band’s music is easy to imagine, but in the 20th century, composers actively adopted noise as a material for music.
Many musical instruments also contain a small amount of noise. Without this slight noise, the unique flavor of the instrument will be affected.

Treble and bass characteristics
Wave propagation
The treble has the property of going in a straight line.
On the other hand, the bass has the property of spreading 360 degrees like waves on the surface of the water.
For example, sirens such as ambulances with relatively high-pitched sounds have different tones depending on the direction.
This type of range influences the phenomenon that when you approach the clubhouse, you feel like only the bass is playing.

And the speed at which sound is transmitted changes depending on the range.
The speed of sound increases with high frequencies and slows down with low frequencies.
It is easy to understand if you imagine fireworks.
You can hear the explosion sound (bass) with a long delay to the sound of fireworks going up.

How humans recognize sound
Illustrated illustration of ears
So what is the mechanism by which humans perceive these sounds?
If you follow the mechanism of the ear, the vibration of the air is first picked up by the earlobe.
Then the vibration reaches the eardrum through the ear canal (auditory canal), and the vibration is transmitted from the spiral organ (cochlea) to the auditory nerve → brain through the ear bone called the ossicle.
It’s a simple explanation, but our ears can finally recognize sound in the brain through that process.
As for the audio, it can be seen that the ears that handle the sound are a very delicate sensory windpipe.

How you listen to it depends on the frequency! Equal volume curve
And since the human ear has a filter function that passes only specific frequencies, it is possible to distinguish between high and low sounds and even chords.
In fact, the human ear has the superiority of sounds that can be heard well and sounds that are difficult to hear, and the way they are heard changes depending on the nature of the sound.
The frequency that humans can hear is said to be 20 Hz to 20,000 Hz, but it also depends on the volume of the sound.
As you can feel, high pitched sounds are easy to hear even with low pitched sounds, but there are some frequency bands that are difficult to hear unless the sound is loud.