MFC0251V3-000U-A99 Просмотр технического описания (PDF) - Unspecified

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MFC0251V3-000U-A99

DC Brushless Fan & Blower

Unspecified 

SOUND QUALITY ANALYSIS AND RESEARCH

Sunon introduced acoustics engineering in the year 2000 to transform the traditional school of Sound Pressure and

Sound Power into the more advanced theory of Sound Quality. Sunon’s Sound Quality analysis and research is performed

by Head Measurement System (HMS) . The HMS system records and simulates the auditory senses of the human ears,

where the sounds, vibration, rotation speed, and electrical signals are measured. The software subsequently performs

time domain and sound quality parameter analysis to assist the acoustics engineers in allowing Sunon products to

feature a more favorable sound quality. The expertise and experience of the acoustics engineer combined with the

software analysis will result in an even more user-friendly environment that is rivaled by none.

Sound Quality Testing

Sound quality is measured in an semi anechoic chamber by means of Head

Measurement System (HMS) .

The Sound quality of fans can be described according to the objective

parameter of sound (Loudness, Tonality, Roughness/Fluctuation, Sharpness).

After the recording of acoustic signals,the data is performed the FFT, order

Psycho acoustic And modulation analyses and playback diagnosis in order to

improve the sound quality of fans.

50cm

Artificial Head

120cm

Horizontal Line

The mobile Sound Quality

Laboratory SQlab II

SQlab II is a compact, mobile multi-channel

measurement system for acoustic analysis, vibration

investigation and sound design. It is used wherever

investigation of sound quality should be combined

with vibrational measurements.

The comparison of vibrational measurements with

acoustic signals enables the user to draw direct

conclusions from sound sources and their sound

quality. For this purpose, SQlab II is able to measure

aurally-accurate recordings of sound events using an

Artificial Head and vibration data with

accelerometers, etc. at the same time. Thus,

correlations between the subjective aural

impressions of sound events (airborne sound) and

the related sources (vibration, solid-borne sound) as

well as transfer mechanisms become apparent. This

is the basis for sound optimization. Moreover, SQlab

II can be used as a "stethoscope" for error analysis.

The Analysis Software

It can analyze, filter, display and document acoustic

and vibration measurement data in a wide range of

modes. Yet an outstanding feature of this software is

the possibility of including the aural sense of the

human user in signal analysis.

HEADphone Playback System

The digital 24 bit HEADphone Playback System HPS

IV is complementary to the Head Measuring System

HMS III. Conditioning of audio data for

aurally-accurate playback is via equalization of the

acoustic signal in the programmable Equalizer PEQ

IV, with subsequent amplification via the Power

Amplifier PVA IV.2. Two electrostatic headphones can

be connected to the playback system, which are

individually calibrated and correspondingly driven.

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