Speaker Testing Solution

Liberate manual listening - efficient and accurate testing

Speaker commonly known as“horn”. is a very commonly usedElectroacoustic transducers can be found in electronic and electrical devices that produce sound.

Opu New Speaker Testing System

The biggest innovation of this system lies in the use of dual microphones for acoustic signal capture. During the testing process, the sound waves emitted by the speaker can be accurately picked up to determine whether the speaker is working properly.

The testing system uses Opxin's self-developed noise analysis algorithm, which can accurately screen for abnormal speakers and free up manual listening.

software platform

MulticheckQuick production testing software

Independent research and development, production, and copyright enjoyment

Support functions

Typical test indicators

frequency response

Sine wave signal sweep test is one of the most basic indicators for audio testing, which can effectively measure the output characteristics of speakers at various frequencies.

20~40kHz，0~1Vrms，0s ~15s，1/24~1/1

sensitivity

Single point value: The value at a certain frequency point in the frequency response curve result, commonly used as the data point at 1kHz. It can effectively measure the working efficiency of speakers under the same input power.

Speaker impedance

Impedance curve: measures the magnitude of the impedance of a speaker operating in different frequency bands, and can generate frequency versus resistance curve results.

resonant frequencyF0Covering multiple speaker basicsT-Sparameter sumF0Numerical value.

polarity

Phase curve: By comparing the input signal with the output signal, observe the phase differences in different frequency bands.

Polarity: Analyze whether the internal speaker of the speaker is reversed through precise algorithms.

distortion

Distortion curveThe full name is Total Harmonic Distortion, abbreviated as THD in English. The curve results obtained from the analysis of high-order harmonic distortion in the signal.

Distortion degreeA single point value on the distortion curve.

Example of Frequency Curve Test Results

Example of Distortion Curve Test Results

Example of Impedance Curve Test Results

Breakthrough testing indicators

Abnormal sound detection（R&B）

Abnormal sound refers to the squeaking or buzzing sound emitted by a speaker during operation. These discordant abnormal sounds cannot be detected by the frequency response curve and distortion curve100%Detected, a large number of speaker manufacturing companies on the market will arrange well-trained employees to conduct manual listening and retesting to prevent the leakage of abnormal sound products. Aopu New Enterprise adopts innovative algorithms to accurately screen products with abnormal sounds through testing equipment, reducing the labor input of speaker manufacturing enterprises.

RB Crest Factor RB Peak Ratio RB Loudness

Cancel manual listening

After multiple tests and verifications, our self-developed algorithm can accurately screen for abnormal sound speakers, and there is no need for manual re listening after instrument testing is completed!

Test Process