1) Wave Form Characteristics
Amplitude – Is the height of a wave. The higher the wave the louder the volume of it.
Frequency – The number of waves that is passed a certain point. Higher frequencies are faster with lower frequency being less. (The number of times something is repeated.)
Velocity – is the speed of an object and the direction it travels in.
Wavelength – the distance between the repeating distances of a wave. The higher it is the shorter it will be, the longer it is the lower it will be.
Harmonic Content – the number of wavelength in the output of a waveform.
Envelope – the change in the intensity of a sound.
Phase - the particular point of a waveform in the cycle measured in degrees.
Reverberation – the collection of reflected sounds. Large rooms will give more reverberation than smaller rooms.
Diffusion – the way sound is spread efficiently to ensure it is spread evenly in a given environment.
Absorption – the property of any material that changes the waveform of a sound.
1/ 3 types of micro phones
Dynamic Microphones – The most robust of microphones and least expensive of the different types available. Example of this would be a SM58. Mainly used for live performances.
Ribbon Microphones – Uses a thin piece of metal in a magnetic field, which is suspended in the mic casing. These mics traditional detect sound in a figure of 8 patterns and can be associated with a 50’s look.
Condenser MIc – These mics require power, also known as Phantom power, which has a current of 48+. This results in a stronger clearer signal than other mics. They are mainly used for recording.
2/ Pollar patterns –
`Omni directional cover 360 degrees of the room
Cardioid covers 131 degrees of the room
Super Cardioid covers 115 degrees of the room
Hyper cardioid 105 degrees of the room
Bi Directional covers 90 degrees of the room.
Generally two types of frequency response exist
FLAT FREQUENCY RESOPNSE & TAILORED FREQUENCY RESPONSE
Both can be described as the sensitivity of the operating range.
The increase in bass as you gets closer to the mic. This is caused by pressure gradients.