AudioChinese dialects

Qingdao Dialect Speech Database

About this dataset

1. Product Overview

The Qingdao Dialect Speech Database contains a total of 309 hours of recordings. The recorded language is the Henan dialect, and the recordings were made in Henan Province, China. A total of 62 speakers were invited to record using their mobile phones in quiet environments. This database has undergone professional proofreading, achieving a word accuracy rate of over 96%, making it suitable for research applications such as voice recognition and speech recognition.

2. Recording Corpus

Recording Text Results

The read‑aloud portion of this database consists of conversational texts, including everyday interactions such as greetings among friends and family, communication between colleagues, and customer service inquiries. Each speaker recorded a different number of texts, with the following distribution:

Number of Sentences · Number of Speakers · Percentage (100%)

0–5K · 40 · 64.52%

5K–10K · 16 · 25.81%

10K–20K: 6 speakers (9.68%)

Corpus Processing

• De‑sensitization: Removal of politically sensitive, personally private, or pornographic/violent content.
• Removal of special symbols such as <, >, [, ], ~, /, \, =, except for numeric strings.
• Exclusion of content containing languages other than Chinese and English.
• Standardized formatting.

3. Speaker Information

Gender Distribution

The database includes a total of 62 speakers: 11 males and 51 females.

Gender · Male · Female · Total

Percentage · 17.74% · 82.26% · 100%

Age Distribution

The age distribution of the speakers is as follows: A (18–25 years old); B (26–40 years old); C (41–50 years old); D (51+ years old).

· Age Group · Number of Speakers · Percentage

A · 18–25 years old · 1 · 1.61%

B · 26–40 years old · 13 · 20.97%

C · 41–50 years old · 31 · 50%

D · 51+ years old · 17 · 27.42%

Total · 262 · 100% ·

4. Data Recording

Recording Environment

A quiet indoor setting, free from echoes and external noise.Recording Equipment

Common smartphones such as Apple, Huawei, Xiaomi, OPPO, etc., were used. The data was stored in 16 kHz, 16-bit WAV format.Recording Method

For the read‑aloud portions, speakers recorded indoors using a smartphone app in close‑talk mode, reading naturally without relying on scripts.Recording Duration Distribution

Speakers randomly selected texts and read them aloud naturally. Individual recording sessions lasted no more than 20 hours and no less than one minute. Specific duration distribution is as follows:

Duration (seconds) · Number of Speakers · Percentage (100%)

0–10K · 28 · 45.16%

10K–20K · 10 · 16.13%

20K–30K · 6 · 9.68%

30K–40K · 10 · 16.13%

40K–50K · 5 · 8.06%

50K–60K · 2 · 3.23%

60K–70K · 1 · 1.61%

5. Speech Data Transcription

Transcribers convert audio into written text, striving to ensure consistency between spoken content and written form. General guidelines include: 1) The transcription must exactly match the spoken audio—no extra words, missing words, or errors. 2) Numbers should be transcribed in Chinese characters—for example, “one two three” instead of “123.” Pay attention to distinguishing “one” from “yao,” and “two” from “liang.” 3) If the audio contains English pronunciation, it should be rendered in corresponding Chinese characters or left as English. Specific cases are as follows: All letters or words in URLs must be capitalized—for example, if the audio says “www,” it should be transcribed as “Three W dot A B C dot com.” English words within the audio should be fully lowercase during transcription. English letters appearing in the audio should be fully capitalized. For certain proper nouns written in all caps, maintain capitalization without spaces—for example, CEO, NBA, etc. 4) The completeness of annotations must align with actual pronunciation; no omissions allowed. 5) Except for traditional expressions (such as “a week,” “a year,” “the second day of the lunar month”), specialized terms (like “ten years sharpening a sword”), and vague phrases (such as “one or two hundred,” “three or four”), all other data should be expressed in Arabic numerals.

6. Data File Directory

Directory Structure

Data directory tree structure

│Data Directory Structure
└─DOC (Textual Description Files)
││├─content.txt (List of Transcribed Content)
││├─spk-info.txt (Speaker Information Table)
└─SPEECHDATA (Audio Folder)
││├─Q001 (Speaker ID)
│││├─Q001W000001.wav (Audio File)