What is Speech Data? Uses, Types & Data Examples

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Eugenio Caterino
Editor & Data Industry Expert

What is Speech Data?

Speech data is a collection of recorded spoken language used to train machine learning models for various applications. It includes audio recordings, transcriptions, phonetic annotations, and other linguistic data. Examples of speech data include voice command data, multilingual speech data, and annotated conversational recordings. This data is essential for developing speech recognition systems, natural language processing (NLP) tools, and enhancing human-computer interactions. On this page, you’ll find the best data sources for various types of speech data.

Best Speech Databases & Datasets

Here is our curated selection of top Speech Data sources. We focus on key factors such as data reliability, accuracy, and flexibility to meet diverse use-case requirements. These datasets are provided by trusted providers known for delivering high-quality, up-to-date information.

Logo of Nexdata

Nexdata | Multilingual Code-switching Speech Data | 5,000 Hours |Audio Data| Speech Recognition Data|AI Training Data

by Nexdata
USA
United Kingdom
Germany
+26
Free sample preview
API available
Starts at
$5,000 / purchase
Logo of Webautomation

WebAutomation Off the Shelf Datasets | Audio Data for AI & ML Training | 600+ Hours of Recording | Speech Recognition, Natural Language Processing

by Webautomation
5.0
USA
United Kingdom
Germany
+61
Pricing available upon request
Logo of WayWithWords

Way With Words' Afrikaans Speech Collection Dataset

by WayWithWords
4.4
South Africa
Free sample preview
Pricing available upon request
Logo of FactSquared

FactSquared Stock Sentiment Speech Analytics Data USA

by FactSquared
USA
Pricing available upon request
Logo of Deeply

Deeply Korean Read Speech Corpus - Audio AI & ML Training Data

by Deeply
South Korea
Pricing available upon request
Logo of StageZero

Bulgarian audio dataset for speech recognition 10 hours (4/4)

by StageZero
Bulgaria
Starts at
€1,250 / purchase
Logo of Nexdata

Nexdata | Multilingual Read Speech Data | 65,000 Hours | Generative AI Audio Data| Speech Recognition Data | Machine Learning (ML) Data

by Nexdata
USA
United Kingdom
Germany
+100
Free sample preview
API available
Starts at
$5,000 / purchase
Logo of WayWithWords

Way With Words' seSotho Speech Collection Dataset

by WayWithWords
4.4
South Africa
Free sample preview
Pricing available upon request
Logo of StageZero

Bulgarian audio dataset for speech recognition 20 hours (3/4)

by StageZero
Bulgaria
Starts at
€2,500 / purchase
Logo of Nexdata

Nexdata |Multilingual Conversational Speech Data | 8kHz Telephone| 15,000 Hours | Audio Data | Speech Recognition Data| Machine Learning (ML) Data

by Nexdata
USA
United Kingdom
Germany
+83
Free sample preview
API available
Starts at
$5,000 / purchase

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Main Attributes of Speech Data

Below, we outline the most popular attributes associated with this type of data—features that data buyers are actively seeking to meet their needs.
Attribute Type Description Action
Language Name String The name of a language as per ISO 639. View 10 datasets

What Type of Data is Speech Data?

Types of speech data include:

  • Voice Commands: Short phrases or commands used for activating devices or services.
  • Conversational Speech: Natural dialogue recordings used for training dialogue systems.
  • Multilingual Speech: Recordings in multiple languages for developing multilingual AI systems.

What is the Bit Rate of Speech Data?

The bit rate of speech, or data rate, indicates the amount of data processed per unit of time in an audio file. Common speech data rates are:

  • 8 kbps: Typically used in telephony for low-quality speech.
  • 16 kbps: Standard for narrowband speech coding.
  • 64 kbps: High-quality speech, often used in digital voice recordings.

How is Speech Data Collected?

Speech data can be collected through various methods:

  • Field Recordings: Capturing natural conversations in real-world environments.
  • Studio Recordings: Using controlled settings to record clear and high-quality audio.
  • Crowdsourcing: Gathering data from volunteers who provide speech samples.
  • Existing Databases: Utilizing publicly available speech datasets from research institutions.

What is Voice Data?

Voice data, spoken data and speech data essentially mean the same thing. They all refer to audio recordings where human language is articulated. This can include everyday conversations, interviews, public speeches, and scripted dialogues. These terms are used interchangeably in fields like Natural Language Processing (NLP) and speech-to-text technologies to describe the raw audio input that is analyzed and processed to develop and improve various applications.

Why is Speech Data Important for AI?

Speech data is crucial for AI technologies, particularly in the fields of speech recognition and NLP. It allows AI systems to understand and process human language, making interactions more natural and intuitive. Integrating speech data with other types of AI training data, such as textual data and Deep Learning Data, enhances the performance of AI models.

Frequently Asked Questions

Where Can I Buy Speech Data?

You can explore our data marketplace to find a variety of Speech Data tailored to different use cases. Our verified providers offer a range of solutions, and you can contact them directly to discuss your specific needs.

How is the Quality of Speech Data Maintained?

The quality of Speech Data is ensured through rigorous validation processes, such as cross-referencing with reliable sources, monitoring accuracy rates, and filtering out inconsistencies. High-quality datasets often report match rates, regular updates, and adherence to industry standards.

How Frequently is Speech Data Updated?

The update frequency for Speech Data varies by provider and dataset. Some datasets are refreshed daily or weekly, while others update less frequently. When evaluating options, ensure you select a dataset with a frequency that suits your specific use case.

Is Speech Data Secure?

The security of Speech Data is prioritized through compliance with industry standards, including encryption, anonymization, and secure delivery methods like SFTP and APIs. At Datarade, we enforce strict policies, requiring all our providers to adhere to regulations such as GDPR, CCPA, and other relevant data protection standards.

How is Speech Data Delivered?

Speech Data can be delivered in formats such as CSV, JSON, XML, or via APIs, enabling seamless integration into your systems. Delivery frequencies range from real-time updates to scheduled intervals (daily, weekly, monthly, or on-demand). Choose datasets that align with your preferred delivery method and system compatibility for Speech Data.

How Much Does Speech Data Cost?

The cost of Speech Data depends on factors like the datasets size, scope, update frequency, and customization level. Pricing models may include one-off purchases, monthly or yearly subscriptions, or usage-based fees. Many providers offer free samples, allowing you to evaluate the suitability of Speech Data for your needs.

Eugenio Caterino

Eugenio Caterino

Editor & Data Industry Expert @ Datarade

Eugenio is an editor and data industry expert with over a decade of experience specializing in B2B data marketplaces and e-commerce platforms. He has a strong background in data analytics, data science, and data management. Eugenio is passionate about helping companies leverage data and technology to drive innovation and business growth, ensuring they can easily and efficiently access the solutions they need.

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