Earphone frequency response curve testing method

Abstract

The invention discloses an earphone frequency response curve test method, which comprises the following steps of: 1, formulating test conditions, preparing earphone test equipment in an anechoic chamber, and setting test parameters by the earphone test equipment; step 2, preparing a mobile phone, wherein a sine wave audio file is stored in a music APP of the mobile phone; 3, preparing a test earphone, wherein the test earphone is connected with the mobile phone through Bluetooth; step 4, wearing the test earphone on the artificial ear; 5, playing the sine wave audio file by using the music APP of the mobile phone; step 6, the simulated ear receives the sound signal output by the test earphone and transmits the sound signal to the earphone test equipment, and the earphone test equipment receives and processes the signal to obtain a frequency response curve graph of the test earphone; therefore, the mobile phone is in Bluetooth connection with the earphone to be tested and is used for playing sine wave audio, so that the test operation of the earphone is realized, the configuration of a traditional Bluetooth adapter is cancelled, the test efficiency of the earphone is improved, the operation is simple, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the field of earphone testing technology, and in particular to an earphone frequency response curve testing method. Background Art

[0002] The practicality of Bluetooth technology has made it ubiquitous in people's daily lives. Through flexible and changeable profiles, Bluetooth technology has been widely used in the consumer field, from headphones, TWS headphones to smart speakers, and even in-car entertainment systems. It is relatively complicated to perform electroacoustic measurements on these products. Adding Bluetooth protocols and various codec support to these products makes the audio measurement of the products even more complicated.

[0003] Good sound, as the name suggests, is highly subjective. Using objective indicators to rigidly define subjective things is prone to problems. On the one hand, tuning is to restore the recording as much as possible, and on the other hand, it also needs to conform to the user's subjective experience. Therefore, whether it is the tuning of headphones or speakers, in addition to technology, it is also an art. Simply put, the frequency response curve indicator can see the style of the headphones as a whole, and tell you what kind of songs the headphones are suitable for. If you cannot listen to them yourself, you can roughly judge whether the sound of the headphones is suitable for you and reduce the risk of blindly choosing.

[0004] Sound quality is a slightly metaphysical term for most consumers. What many people call sound quality is actually their subjective listening experience, not the deviation between the headphones and the real sound, because most people have not listened to reference-level music playback, and there is no standard evaluation, so there is the concept of subjective sound quality, which can also be understood as the sense of hearing or whether it feels good or not, but this is more practical for most consumers; the frequency response curve is the only indicator of this algorithm for predicting the listening experience / subjective sound quality of headphones. Under normal circumstances, the curve of the headphones will directly reflect its listening experience, but it is not absolute, because the diaphragm of the speaker, the shape of the cavity and the ventilation cloth will also affect the timbre. Through the frequency response curve, we can objectively see the quality of the sound of a headphone. No matter how exaggerated the various high-end headphones are promoted on the Internet, they are not as convincing as the curve! Therefore, through the frequency response curve, we can objectively distinguish the quality of the sound of a Bluetooth headset.

[0005] As the acoustic frequency response curve test for developing Bluetooth headsets, the test steps are as follows:

[0006] 1. Open the test module of the Soundcheck acoustic test system on the test computer and set the test conditions;

[0007] 2. Turn on the headset to be tested and enter the Bluetooth search and pairing connection mode;

[0008] 3. After the computer host is connected to the external Bluetooth Dongel (Bluetooth adapter), open the Dongel tool software and search for the Bluetooth window in the interface;

[0009] 4. Search the Bluetooth window to find the pairing mode address code or model of the headset (if the corresponding address code is not found, you need to refresh and search again);

[0010] 5. After finding the pairing mode address code or model of the headset, select the corresponding headset and click "OK" to confirm the successful connection with the Bluetooth headset; (If the connection fails multiple times, return to step 3 and repeat the operation)

[0011] 6. After the connection is successful, choose to enter A2DP mode;

[0012] 7. Put the earphone into the simulated ear and prepare for the test;

[0013] 8. Soundcheck starts the test, and finally a Bluetooth headset frequency response curve is generated on the computer interface.

[0014] It can be seen that Dongel plays a very important role in the acoustic test of Bluetooth headsets. It can effectively connect the Bluetooth headsets with the test system and convert the Bluetooth signals into signals that can be recognized by the test computer so that data can be transmitted between them. However, it also has obvious disadvantages. On the one hand, each test equipment needs to purchase an additional set of Dongel, which can cost thousands or tens of thousands, increasing the cost. On the other hand, the operation of external Dongel is cumbersome and time-consuming, and occasionally it will cause connection difficulties and intermittent problems with the headset. In addition, Dongel often needs software upgrades. Summary of the invention

[0015] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a headphone frequency response curve testing method, which utilizes a mobile phone to connect to the headphone to be tested via Bluetooth and uses the mobile phone to play sine wave audio to achieve the testing operation of the test headphone, eliminates the configuration of the traditional Bluetooth adapter, improves the testing efficiency of the test headphone, is simple to operate, and has a wide range of applications.

[0016] To achieve the above purpose, the present invention adopts the following technical solutions:

[0017] A method for testing a headphone frequency response curve comprises the following steps:

[0018] Step 1: formulate test conditions, prepare headphone test equipment in the anechoic chamber, and set test parameters for the headphone test equipment;

[0019] Step 2: Prepare a mobile phone with a sine wave audio file stored in the music app.

[0020] Step 3: Prepare a test headset, which is connected to the mobile phone via Bluetooth;

[0021] Step 4: Wear the test earphone on the artificial ear;

[0022] Step 5: Use the music app on your phone to play the sine wave audio file;

[0023] Step 6: The artificial ear receives the sound signal output by the test earphone and transmits it to the earphone test device. The earphone test device receives and processes the signal to obtain a frequency response curve of the test earphone.

[0024] As a preferred solution, in step 4, the test earphone has a left earphone and a right earphone, one of the left earphone and the right earphone is worn on the artificial ear, and the other earphone is worn on the tester;

[0025] In step five, when the tester hears the sound prompt in the sine wave audio through the earphone, the earphone test equipment is controlled to receive and process the signal transmitted by the simulated ear to obtain the frequency response curve of the earphone at the simulated ear.

[0026] As a preferred solution, the method further includes step 7, removing the earphone at the simulated ear and wearing it on the tester, removing the other earphone on the tester and wearing it on the simulated ear, and repeating steps 5 and 6 to obtain a frequency response curve of the other earphone;

[0027] The frequency response curves of the two earphones are analyzed and compared to determine whether the two earphones are synchronized.

[0028] As a preferred solution, in step five, the volume of the mobile phone is adjusted to maximum.

[0029] As a preferred solution, in step 2, the sine wave audio file is 20-20KHz.

[0030] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that the present invention mainly realizes the testing operation of the test headset by using the Bluetooth connection between the mobile phone and the headset to be tested and playing the sine wave audio with the mobile phone through the design of each step, cancels the configuration of the traditional Bluetooth adapter, saves the testing cost, improves the testing efficiency of the test headset, is simple to operate, easy to use, and has a wide range of applications.

[0031] Furthermore, the setting of step seven is conducive to synchronous testing of the left earphone and the right earphone in the test earphone, thereby ensuring the consistency of performance of the left and right earphones of the test earphone, improving the yield rate of the product and improving the usability.

[0032] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a module diagram of the testing method of an embodiment of the present invention. DETAILED DESCRIPTION

[0034] Please refer to Figure 1 As shown, it shows the specific structure of an embodiment of the present invention.

[0035] A method for testing a headphone frequency response curve comprises the following steps:

[0036] Step 1: formulate test conditions, prepare headphone test equipment in the anechoic chamber, and set test parameters for the headphone test equipment;

[0037] Step 2: Prepare a mobile phone with a sine wave audio file stored in the music app.

[0038] Step 3: Prepare a test headset, which is connected to the mobile phone via Bluetooth;

[0039] Step 4: Wear the test earphone on the artificial ear;

[0040] Step 5: Use the music app on your phone to play the sine wave audio file;

[0041] Step 6: The artificial ear receives the sound signal output by the test earphone and transmits it to the earphone test device, and the earphone test device receives and processes the signal to obtain a frequency response curve of the test earphone;

[0042] Specifically, in step 2, the sine wave audio file is 20-20KHz; in step 5, the volume of the mobile phone is adjusted to the maximum. In this way, the mobile phone is connected to the headset to be tested via Bluetooth and the sine wave audio is played by the mobile phone to realize the test operation of the test headset, which cancels the configuration of the traditional Bluetooth adapter, saves the test cost, and improves the test efficiency of the test headset. At the same time, it should be noted that the mobile phone can be an Android phone or an Apple phone, etc. As long as the mobile phone can connect to Bluetooth normally and play audio signals, this solution is applicable. The operation is simple, the use is convenient, and the application range is wide.

[0043] In step 4, the test headset comprises a left headset and a right headset, one of the left headset and the right headset is worn on the artificial ear, and the other headset is worn on the tester;

[0044] In step five, when the tester hears the sound prompt in the sine wave audio through the earphone, the earphone test equipment is controlled to receive and process the signal transmitted by the simulated ear to obtain the frequency response curve of the earphone at the simulated ear.

[0045] The method further includes a step 7, removing the earphone at the simulated ear and wearing it on the tester, removing another earphone on the tester and wearing it on the simulated ear, and repeating steps 5 and 6, thereby obtaining a frequency response curve of the other earphone;

[0046] By analyzing and comparing the frequency response curves of the two earphones, it is determined whether the two earphones are synchronized. Thus, the setting of step seven is conducive to the synchronous test of the left earphone and the right earphone in the test earphone, thereby ensuring the consistency of the performance of the left and right earphones of the test earphone, improving the yield rate of the product and achieving good usability.

[0047] In summary, the design focus of the present invention is that it mainly realizes the test operation of the test headset by using the Bluetooth connection between the mobile phone and the headset to be tested and playing the sine wave audio with the mobile phone through the design of each step, cancels the configuration of the traditional Bluetooth adapter, saves the test cost, improves the test efficiency of the test headset, is simple to operate, easy to use, and has a wide range of applications;

[0048] Furthermore, the setting of step seven is conducive to synchronous testing of the left earphone and the right earphone in the test earphone, thereby ensuring the consistency of performance of the left and right earphones of the test earphone, improving the yield rate of the product and improving the usability.

Claims

1. A method for testing a headphone frequency response curve, characterized in that: The following steps are included: Step 1: formulate test conditions, prepare headphone test equipment in the anechoic chamber, and set test parameters for the headphone test equipment; Step 2: Prepare a mobile phone with a sine wave audio file stored in the music app. Step 3: Prepare a test headset, which is connected to the mobile phone via Bluetooth; Step 4: Wear the test earphone on the artificial ear; Step 5: Use the music app on your phone to play the sine wave audio file; Step 6: The artificial ear receives the sound signal output by the test earphone and transmits it to the earphone test device. The earphone test device receives and processes the signal to obtain a frequency response curve of the test earphone.

2. The headphone frequency response curve testing method according to claim 1, characterized in that: In step 4, the test headset comprises a left headset and a right headset, one of the left headset and the right headset is worn on the artificial ear, and the other headset is worn on the tester; In step five, when the tester hears the sound prompt in the sine wave audio through the earphone, the earphone test equipment is controlled to receive and process the signal transmitted by the simulated ear to obtain the frequency response curve of the earphone at the simulated ear.

3. The headphone frequency response curve testing method according to claim 2, characterized in that: The method further includes a step 7, removing the earphone at the simulated ear and wearing it on the tester, removing another earphone on the tester and wearing it on the simulated ear, and repeating steps 5 and 6, thereby obtaining a frequency response curve of the other earphone; The frequency response curves of the two earphones are analyzed and compared to determine whether the two earphones are synchronized.

4. The headphone frequency response curve testing method according to claim 1, characterized in that: In step five, the volume of the mobile phone is adjusted to maximum.

5. The headphone frequency response curve testing method according to claim 1, characterized in that: In step 2, the sine wave audio file is 20-20KHz.

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