0 Understanding | Overtone | Harmonic Partials | Timbre

Overtone Definition

Any frequency which are higher than fundamental frequency of a sound, we call them, overtone. And the fundamental sound consists of many overtones. This event is called partials. We, as musicians, would probably heard of harmonic, to be even more precise, harmonic partials. The harmonic partials are the numbers of frequencies whose integer multiple frequency of the fundamental, which also including the fundamental itself (1^st partial). However, partials, which are not whole number ratios of the fundamental, will be called inharmonic.

Harmonic Series of String

0 Why Don't Opera Singers Use Microphone

Acoustic of singing

According to acoustic perception, sound are produced by forced of energy that travel through the air. In singing, as in speaking, voice sounds are produced by vocal fold vibrations that interrupt the air stream from the lungs, producing a branch of air pulses. The vocal tract, consist of pharynx and the mouth then stimulate this signal into strong resonance peaks or formants to the spectrum of the singer's sound. 

Why don't opera singers use microphone

The formants of speaking voice and singing voice are quite similar. Except the singing voice, which is produced in such concentration of energy between 2,000 and 3,500 Hz, referred to as the singer's formant, which gives the trained opera singer's voice a "shine" and allows the opera singer to be heard in the presence state of a loud orchestral accompaniment.

Example of one of Wagner's opera

The ride of the valkylies from Wagner's ring cycle, my favorite ;-DDD

0 Difference Between ACOUSTIC RANGE | ULTRASOUND | INFRASOUND

FREQUENCY IN SOUND WAVE

Difference between acoustic range, ultrasound and infrasound can be determined on different frequency. Well let go back to Pitch definition, as i had posted in earlier posted about the difference between sound waves, pitch, tone and noise. In music, the pitch of the certain note define as the perception of frequency. For instance, note middle C has frequency as 262 Hertz. Concert A has frequency as 440 Hertz.

Sound Wave

What does it mean, when we describe wave of having a certain Hertz? 

In middle C has frequency as 262 Hertz means the wave of 262 Hertz has 262 wave cycles in a second. A wave of 440 Hertz has 440 wave cycles in a second. 

Frequency of Concert A in Different Octave

Difference between Acoustic range, Ultrasound and Infrasound

• Acoustic Range

Human can only perceive the frequency from 20 Hertz - 20,000 Hertz. This range is known as Acoustic Range. 

• Ultrasound

Human cannot perceive sound wave above 20,000 Hertz. It's too high for us. Only the animals can do. Such as dog and bat can hear sound above 20,000 Hertz. Thus sound waves which have frequency above 20,000 Hertz are considered Ultrasound.

• Infrasound

Well, sound waves which have frequency below 20 Hertz are considered as Infrasound. We human cannot perceive it, it's too low. We can't hear it. Whales use Infrasound to communicate among them. 

0 Difference Between SOUNDWAVE | PITCH | TONE | NOISE

Difference between SOUND WAVE | PITCH | TONE and NOISE

Most of the sounds we hear are brought to our ears through the air. A moment of object causes a disturbance of the air molecules near the object so that the disturbance itself becomes a thing that moves through air, thus a SOUND WAVE.

0 How to Define Terms of Acoustic?

What is ACOUSTIC?

How to define terms of acoustic? Acoustic is interdisciplinary science that deals with the study of MECHANICAL WAVES in GASSES, LIQUIDS and SOLIDS including VIBRATION, SOUND, ULTRASOUND and INFRASOUND.