international volume
international volume, Total:191 items.
The international standard classification for "international volume" includes: Character sets and information coding .
The Chinese standard classification for "international volume" includes: Codification .
Taiwan Provincial Standard of the People's Republic of China
- CNS 13947-1999 Documentation-Interantional standard recordingcode (ISRC)
未注明发布机构
- SAE EIA-765A-2015 International and National Quality Standards Index
National Metrological Technical Specifications of the People's Republic of China
- JJF 1868-2020 The Rules for Adoption of International Metrological Specifications
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB/T 17295-1998 Codes for units of measure used in international trade
- GB/T 17295-2008 Codes for units of measure used in international trade
International Telecommunication Union (ITU)
- ITU-T N.23 FRENCH-1988 MAINTENANCE MEASUREMENTS TO BE MADE ON INTERNATIONAL SOUND-PROGRAMME CIRCUITS
- ITU-T N.23 SPANISH-1988 MAINTENANCE MEASUREMENTS TO BE MADE ON INTERNATIONAL SOUND-PROGRAMME CIRCUITS
- ITU-T N.23-1988 MAINTENANCE MEASUREMENTS TO BE MADE ON INTERNATIONAL SOUND-PROGRAMME CIRCUITS
- ITU-T M.830 SPANISH-1988 Routine measurements to be made on international voice-frequency telegraph links
- ITU-T M.830 FRENCH-1988 Routine measurements to be made on international voice-frequency telegraph links
- ITU-T M.830-1988 Routine measurements to be made on international voice-frequency telegraph links
- ITU-T R.73-1989 Maintenance Measurements to Be Carried out on the Channels of International VFT Systems - Telegraph Transmission (Study Group IX) 2 pp
- ITU-R BR.1384-2 SPANISH-2011 Parameters for international exchange of multi-channel sound recordings with or without accompanying picture
- ITU-R BR.1384-2-2011 Parameters for international exchange of multi-channel sound recordings with or without accompanying picture
- ITU-R BS.645-1992 Test signals and metering to be used on international sound programme connections
- ITU-R BR.1384-1 SPANISH-2005 Parameters for international exchange of multi-channel sound recordings with or without accompanying picture Par醡etros para el intercambio internacional de grabaciones sonoras multicanal con o sin acompa馻miento de imagen
- ITU-T N.1-1993 DEFINITIONS FOR APPLICATION TO INTERNATIONAL SOUND-PROGRAMME AND TELEVISION-SOUND TRANSMISSION Study Group IV
- ITU-T R.76 SPANISH-1988 RESERVE CHANNELS FOR MAINTENANCE MEASUREMENTS ON CHANNELS OF INTERNATIONAL VFT SYSTEMS
- ITU-T J.15 FRENCH-1988 Lining - up and Monitoring an International Sound - Programme Connection
- ITU-T R.76 FRENCH-1988 RESERVE CHANNELS FOR MAINTENANCE MEASUREMENTS ON CHANNELS OF INTERNATIONAL VFT SYSTEMS
- ITU-T R.75BIS-1988 Maintenance measurements of character error rate on international sections of international telegraph circuits
- ITU-T N.10 SPANISH-1993 LIMITS FOR THE LINING-UP OF INTERNATIONAL SOUND-PROGRAMME LINKS AND CONNECTIONS
- ITU-T R.70 BIS FRENCH-1988 NUMBERING OF INTERNATIONAL VFT CHANNELS
- ITU-T R.70 BIS SPANISH-1988 NUMBERING OF INTERNATIONAL VFT CHANNELS
- ITU-R BR.777-3 FRENCH-2001 International Exchange of Two-Channel Digital Audio Recordings
- ITU-R BR.777-3-2001 International Exchange of Two-Channel Digital Audio Recordings
- ITU-R BR.777-3 SPANISH-2001 International Exchange of Two-Channel Digital Audio Recordings
- ITU-T N.10 FRENCH-1993 LIMITS FOR THE LINING-UP OF INTERNATIONAL SOUND-PROGRAMME LINKS AND CONNECTIONS
- ITU-T R.72-1988 PERIODICITY OF MAINTENANCE MEASUREMENTS TO BE CARRIED OUT ON THE CHANNELS OF INTERNATIONAL VFT SYSTEMS
- ITU-T R.72-1989 Periodicity of Maintenance Measurements to Be Carried out on the Channels of International VFT Systems - Telegraph Transmission (Study Group IX) 1 pp
- ITU-R BR.1384-1-2005 Parameters for International Exchange of Multi-Channel Sound Recordings with or without Accompanying Picture
- ITU-T M.820-1988 Periodicity of routine tests on international voice-frequency telegraph links
- ITU-T M.820 SPANISH-1988 Periodicity of routine tests on international voice-frequency telegraph links
- ITU-T J.15 SPANISH-1988 LINING - UP AND MONITORING AN INTERNATIONAL SOUND-PROGRAMME CONNECTION
- ITU-T M.820 FRENCH-1988 Periodicity of routine tests on international voice-frequency telegraph links
- ITU-R QUESTION 134/6-2010 Recording of digital sound programme signals for international exchange
- ITU-T R.76-1988 RESERVE CHANNELS FOR MAINTENANCE MEASUREMENTS ON CHANNELS OF INTERNATIONAL VFT SYSTEMS
- ITU-T R.75 FRENCH-1988 MAINTENANCE MEASUREMENTS ON CODE - INDEPENDENT INTERNATIONAL SECTIONS OF INTERNATIONAL TELEGRAPH CIRCUITS
- ITU-T R.76-1989 Reserve Channels for Maintenance Measurements on Channels of International VFT Systems - Telegraph Transmission (Study Group IX) 1 pp
- ITU-T R.30 SPANISH-1988 TRANSMISSION CHARACTERISTIC FOR INTERNATIONAL VFT LINKS
- ITU-T R.75 SPANISH-1988 MAINTENANCE MEASUREMENTS ON CODE - INDEPENDENT INTERNATIONAL SECTIONS OF INTERNATIONAL TELEGRAPH CIRCUITS
- ITU-R BR.408-7-2001 International Exchange of Sound Programmes Recorded in Analogue Form [Superseded: ITU-R BR.407-4]
- ITU-T N.10-1993 Limits for the Lining-up of International Sound-Programme Links and Connections (Study Group IV; 10 pp)
- ITU-R BR.1384-2011 Parameters for international exchange of multi-channel sound recordings with or without accompanying picture
- ITU-R QUESTION 1346-2010 Recording of digital sound programme signals for international exchange
- ITU-R BS.645-2-1992 Test Signals and Metering to Be Used on International Sound Programme Connections - Section 10C - Audio-Frequency Characteristics of Sound-Broadcasting Signals
- ITU-T R.30 FRENCH-1988 TRANSMISSION CHARACTERISTIC FOR INTERNATIONAL VFT LINKS
- ITU-T R.75 BIS FRENCH-1988 MAINTENANCE MEASUREMENTS OF CHARACTER ERROR RATE ON INTERNATIONAL SECTIONS OF INTERNATIONAL TELEGRAPH CIRCUITS
- ITU-T R.75 BIS SPANISH-1988 MAINTENANCE MEASUREMENTS OF CHARACTER ERROR RATE ON INTERNATIONAL SECTIONS OF INTERNATIONAL TELEGRAPH CIRCUITS
- ITU-T J.14 FRENCH-1988 RELATIVE LEVELS AND IMPEDANCES ON AN INTERNATIONAL SOUND - PROGRAMME CONNECTION
- ITU-T J.26-1990 Test Signals to Be Used on International Sound-Programme Connections - Television and Sound Transmission Formerly Recommendation ITU-R CMTT.645; Study Group 9; 5 pp
- ITU-T J.14 SPANISH-1988 RELATIVE LEVELS AND IMPEDANCES ON AN INTERNATIONAL SOUND - PROGRAMME CONNECTION
- ITU-T N.15 FRENCH-1988 MAXIMUM PERMISSIBLE POWER DURING AN INTERNATIONAL SOUND-PROGRAMME TRANSMISSION
- ITU-T R.75-1989 Maintenance Measurements on Code-Independent International Sections of International Telegraph Circuits - Telegraph Transmission Study Group IX; 1 pp
- ITU-T R.72 SPANISH-1988 PERIODICITY OF MAINTENANCE MEASUREMENTS TO BE CARRIED OUT ON THE CHANNELS OF INTERNATIONAL VFT SYSTEMS
- ITU-T N.15 SPANISH-1988 MAXIMUM PERMISSIBLE POWER DURING AN INTERNATIONAL SOUND-PROGRAMME TRANSMISSION
- ITU-R BR.407-4 SPANISH-1990 INTERNATIONAL EXCHANGE OF SOUND PROGRAMMES RECORDED IN ANALOGUE FORM INTERCAMBIO INTERNACIONAL DE PROGRAMAS DE RADIODIFUSI覰 SONORA GRABADOS EN FORMA ANAL覩ICA
- ITU-T R.75-1988 MAINTENANCE MEASUREMENTS ON CODE - INDEPENDENT INTERNATIONAL SECTIONS OF INTERNATIONAL TELEGRAPH CIRCUITS
- ITU-T R.75 BIS-1989 Maintenance Measurements of Character Error Rate on International Sections of International Telegraph Circuits - Telegraph Transmission (Study Group IX) 1 pp
- ITU-T J.27-1990 Signals for the Alignment of International Sound-Programme Connections - Television and Sound Transmission Formerly Recommendation ITU-R CMTT.661; Study Group 9; 5 pp
- ITU-T R.72 FRENCH-1988 PERIODICITY OF MAINTENANCE MEASUREMENTS TO BE CARRIED OUT ON THE CHANNELS OF INTERNATIONAL VFT SYSTEMS
- ITU-T R.75 BIS-1988 MAINTENANCE MEASUREMENTS OF CHARACTER ERROR RATE ON INTERNATIONAL SECTIONS OF INTERNATIONAL TELEGRAPH CIRCUITS
- ITU-T N.1 FRENCH-1993 DEFINITIONS FOR APPLICATION TO INTERNATIONAL SOUND-PROGRAMME AND TELEVISION-SOUND TRANSMISSION Study Group IV
- ITU-R BS.645-2 SPANISH-1992 TEST SIGNALS AND METERING TO BE USED ON INTERNATIONAL SOUND PROGRAMME CONNECTIONS
- ITU-T N.11 SPANISH-1988 ESSENTIAL TRANSMISSION PERFORMANCE OBJECTIVES FOR INTERNATIONAL SOUND-PROGRAMME CENTRES (ISPC)
- ITU-T D.180 ARABIC-2005 Occasional provision of circuits for international sound- and television-programme transmissions
- ITU-R BS.1726 SPANISH-2005 Signal level of digital audio accompanying television in international programme exchange
- ITU-T D.180 RUSSIAN-2005 Occasional provision of circuits for international sound-and television-programme transmissions
- ITU-T N.11 FRENCH-1988 Essential Transmission Performance Objectives for International Sound-Programme Centres (ISPC)
- ITU-T N.1 SPANISH-1993 DEFINITIONS FOR APPLICATION TO INTERNATIONAL SOUND-PROGRAMME AND TELEVISION-SOUND TRANSMISSION
- ITU-R BS.645-2 FRENCH-1992 TEST SIGNALS AND METERING TO BE USED ON INTERNATIONAL SOUND PROGRAMME CONNECTIONS
- ITU-R BS.1726 FRENCH-2005 Signal level of digital audio accompanying television in international programme exchange
- ITU-T D.180 CHINESE-2005 Occasional provision of circuits for international sound-and television-programme transmissions
- ITU-T D.180 SPANISH-2005 Occasional provision of circuits for international sound- and television-programme transmissions Series D: General Tariff Principles; General tariff principles - International sound-and television-programme transmissions Study Group 3
- ITU-T D.180-2005 Occasional provision of circuits for international sound- and television-programme transmissions Series D: General Tariff Principles; General tariff principles - International sound-and television-programme transmissions Study Group 3
- ITU-T D.180 FRENCH-2005 Occasional provision of circuits for international sound- and television-programme transmissions Series D: General Tariff Principles; General tariff principles - International sound-and television-programme transmissions Study Group 3
- ITU-T G.422-1988 Interconnection at Audio-Frequencies - International Analogue Carrier Systems (Study Group XV) 2 pp
- ITU-T E.523-1988 Standard traffic profiles for international traffic streams
- ITU-T FASCICLE IV.3 Maintenance of International Sound - Programme and Television Transmission Circuits - Series N Recommendations
- ITU-T N.51-1988 DEFINITIONS FOR APPLICATION TO INTERNATIONAL TELEVISION TRANSMISSIONS
- ITU-T G.115-1996 MEAN ACTIVE SPEECH LEVEL FOR ANNOUNCEMENTS AND SPEECH SYNTHESIS SYSTEMS Study Group 12
Japanese Industrial Standards Committee (JISC)
- JIS X 0308:2022 International Standard Recording Code (ISRC)
CEPT - Conference Europeenne des Administrations des Postes et des Telecommunications
- CEPT T/N 33-01 E-1987 International Digital Audiographic Teleconferencing
- CEPT T/CAC 013 E-1992 QOS Improvement of PSPDN International Traffic in CEPT
ITU-R - International Telecommunication Union/ITU Radiocommunication Sector
- ITU-R BR.777-1-1994 International Exchange of Digital Audio Recordings
- ITU-R BR.1384-1998 Parameters for International Exchange of Multi-Channel Sound Recordings
- ITU-R BR.777-1992 International Exchange of Digital Audio Recordings
- ITU-R BR.777-2-1995 International Exchange of Digital Audio Recordings
- QUESTION 134/6-2010 Recording of digital sound programme signals for international exchange
- ITU-R BR.407-4 FRENCH-1990 INTERNATIONAL EXCHANGE OF SOUND PROGRAMMES RECORDED IN ANALOGUE FORM
- ITU-R BS.645-1-1990 Test Signals to Be Used on International Sound-Programme Connections - Section 10C - Audio-Frequency Characteristics of Sound-Broadcasting Signals
- ITU-R BR.408-5-1990 Standards of Sound Recording on Magnetic Tape for the International Exchange of Programmes - Section 10/11F - Exchange of Recorded Sound Programmes
International Organization for Standardization (ISO)
- ISO/R 233:1961 International system for the transliteration of Arabic characters
- ISO 10957:2021 Information and documentation — International standard music number (ISMN)
- ISO/R 9:1968 International system for the transliteration of Slavic Cyrillic characters
- ISO 3901:2019 Information and documentation — International Standard Recording Code (ISRC)
- ISO 10957:1993 Information and documentation; international standard music number (ISMN)
- ISO 15707:2001 Information and documentation - International Standard Musical Work Code (ISWC)
- ISO 10957:2009 Information and documentation - International standard music number (ISMN)
- ISO 15707:2022 Information and documentation — International Standard Musical Work Code (ISWC)
- ISO 2204:1979 Acoustics; Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings
- ISO 2204:1973 Title missing - Legacy paper document
- ISO/R 843:1968 International system for the transliteration of Greek characters into Latin characters
SE-SIS
- SIS SMS 2100-1967 ISO-tolerantes. Survev
- SIS SS 404 09 00-1979 Insulating materials — Survey of standards — International standards' validity as Swedish standard
- SIS SS 62 55 11-1991 Documentation — International standard serial numbering (ISSN)
SCC
- DANSK DS/ISO 3901:2019 Information and documentation – International Standard Recording Code (ISRC)
- DANSK DS/ISO 10957:2009 Information and documentation – International standard music number (ISMN)
- DANSK DS/ISO 15707:2002 Information and documentation – International Standard Musical Work Code (ISWC)
- AS 1852.806:1988 International electrotechnical vocabulary - Recording and reproduction of sound and video
- 08/30153603 DC BS ISO 10957. Information and documentation. International standard music number (ISMN)
GSO
- OS GSO ISO 3901:2009 Information and documentation - International Standard Recording Code (ISRC)
- OS GSO ISO 10957:2014 Information and documentation – International standard music number (ISMN)
- BH GSO ISO 10957:2015 Information and documentation – International standard music number (ISMN)
- GSO ISO 15707:2013 Information and documentation -- International Standard Musical Work Code (ISWC)
- OS GSO ISO 15707:2013 Information and documentation -- International Standard Musical Work Code (ISWC)
- BH GSO OIML V1:2022 International Vocabulary of Terms in Legal Metrology
- BH GSO ISO 15707:2016 Information and documentation -- International Standard Musical Work Code (ISWC)
- GSO OIML V1:2021 International Vocabulary of Terms in Legal Metrology
ZA-SANS
- SANS 10957:2009 Information and documentation - International standard music number (ISMN)
- SANS 15707:2005 Information and documentation - International Standard Musical Work Code (ISWC)
British Standards Institution (BSI)
- BS ISO 10957:2021 Information and documentation. International standard music number (ISMN)
- BS ISO 3901:2019 Information and documentation. International Standard Recording Code (ISRC)
- BS ISO 10957:2009 Information and documentation - International standard music number (ISMN)
- BS IEC 60050-723:1997 International electrotechnical vocabulary. Broadcasting. Sound, television, data
- BS ISO 15707:2022 Information and documentation. International Standard Musical Work Code (ISWC)
- TH 42140-2003 Electrical plugs and wiring - An international survey
- BS IEC 60050-807:1998 International electrotechnical vocabulary - Digital recording of audio and video signals
- BS ISO 15707:2001 Information and documentation. International standard musical work code (ISWC)
- BS IEC 50-806:1997 International electrotechnical vocabulary. Recording and reproduction of audio and video
KR-KS
- KS X ISO 3901-2016 Information and documentation — International Standard Recording Code(ISRC)
- KS X ISO 15707-2016 Information and documentation-International Standard Musical Work Code (ISWC)
- KS C IEC 60050-807-2020 International Electrotechnical Vocabulary — Part 807:Digital recording of audio and video signals
Korean Agency for Technology and Standards (KATS)
- KS X ISO 3901-2023 Information and documentation — International Standard Recording Code (ISRC)
- KS A 0002-2019 International vocabulary of legal metrology
- KS A 0002-2017 International vocabulary of legal metrology
- KS X ISO 15707-2016(2021) Information and documentation-International Standard Musical Work Code (ISWC)
- KS X ISO 15707-2021 Information and documentation-International Standard Musical Work Code (ISWC)
- KS A OIML V 1-2019 International vocabulary of legal metrology(VIML)
- KS C IEC 60050-807:2020 International Electrotechnical Vocabulary — Part 807:Digital recording of audio and video signals
- KS X ISO 15707:2014 Information and documentation-International Standard Musical Work Code (ISWC)
- KS X ISO 15707:2003 Information and documentation-International Standard Musical Work Code (ISWC)
- KS C IEC 60050-723-2022 International Electrotechnical Vocabulary-Chapter 723:Broadcasting:Sound, television, data
- KS C IEC 60050-723:2002 International Electrotechnical Vocabulary-Chapter 723:Broadcasting:Sound, television, data
- KS X ISO 15707:2016 Information and documentation-International Standard Musical Work Code (ISWC)
- KS C IEC 60050-723-2002(2017) International Electrotechnical Vocabulary-Chapter 723:Broadcasting:Sound, television, data
- KS C IEC 60050-723-2002(2022) International Electrotechnical Vocabulary-Chapter 723:Broadcasting:Sound, television, data
- KS A ISO 12611-2002(2022) Cinematography-Audio head tones for use in international exchange of 35 mm magnetic film masters-Specifications and location
- KS X ISO 15706-1:2016 Information and documentation — International Standard Audiovisual Number(ISAN) — Part 1: Audiovisual work identifier
- KS A ISO/IEC GUIDE 21-2-2005(2021) Regional or national adoption of International Standards and other International Deliverables Part 2 Adoption of International Deliverables other than International Standards
Danish Standards Foundation
- DS/ISO 10957:2009 Information and documentation - International standard music number (ISMN)
- DS/ISO 15707:2002 Information and documentation - International Standard Musical Work Code (ISWC)
Standard Association of Australia (SAA)
- AS/NZS 5901:2020 Information and documentation — International Standard Recording Code (ISRC)
- AS/NZS ISO 10957:2023 Information and documentation — International standard music number (ISMN)
- AS/NZS ISO 10957:2016 Information and documentation — International standard music number (ISMN)
- AS/NZS ISO 10957:2004 Information and documentation - International standard music number (ISMN)
- AS/NZS ISO 15707:2023 Information and documentation — International Standard Musical Work Code (ISWC)
- AS 1852.302:1988 International electrotechnical vocabulary - Electrical measuring instruments
ITU-T - International Telecommunication Union/ITU Telcommunication Sector
- ITU-T H.21-1984 Composition and terminology of international voice-frequency telegraph systems
- ITU-T H.21 FRENCH-1984 Constitution et terminologie des systèmes internationaux de télégraphie harmonique
- ITU-T H.21 SPANISH-1984 Composition and terminology of international voice-frequency telegraph systems
- ITU-T N.1-1989 Definitions for Application to International Sound-Programme Transmissions - Maintenance of International Sound-Programme and Television Transmission Circuits (Study Group IV; 8 pp)
- ITU-T N.10-1989 Limits for the Lining-up of International Sound-Programme Links and Connections - Maintenance of International Sound-Programme and Television Transmission Circuits (Study Group IV; 8 pp)
- ITU-T D.180 CORR.-1996 Occasional Provision of Circuits for International Sound- and Television-Programme Transmissions
- ITU-T H.23-1984 Basic characteristics of telegraph equipments used in international voice-frequency telegraph systems
- ITU-T H.23 SPANISH-1984 Características esenciales de los equipos de telegrafía utilizados en los sistemas internacionales de telegrafía armónica
- ITU-T H.22 FRENCH-1984 Conditions imposées aux liaisons internationales pour télégraphie harmonique (à 50@ 100 ou 200 bauds)
- ITU-T H.22-1984 Transmission requirements of international voice-frequency telegraph links (at 50@ 100 and 200 bauds)
Society of Automotive Engineers (SAE)
- SAE EIA-765A-2016 International and National Quality Standards Index
Electronic Industrial Alliance (U.S.)
- EIA-765-A-2000 International and National Quality Standards Index
Association Francaise de Normalisation
- NF Z41-103*NF ISO 10957:1994 Information and documentation. International standard music number (ismn).
- NF ISO 15707:2023 Information et documentation - Code international normalisé des oeuvres musicales (ISWC)
- NF Z41-105*NF ISO 15707:2003 Information and documentation - International Standard Musical Work Code (ISWC)
American National Standards Institute (ANSI)
- ANSI/EIA 765-A:2000 International and National Quality Standards Index
CO-ICONTEC
- ICONTEC 1000-1985 Weights and Measures, International System of Weights and Measures
AENOR
- UNE 21302-723:2005 International vocabulary - Chapter 723: Broadcasting: Sound, television, data
NZ-SNZ
- AS/NZS ISO 15707:2004 Information and documentation International Standard Music Work Code (ISWC)
CZ-CSN
- CSN 73 6105-1986 International highways. Traffic counts
- CSN 01 0187-1988 International standard serial numbering (ISSN)
- CSN 01 0115-1996 International Vocabulary of Basic and General Terms in Metrology
International Electrotechnical Commission (IEC)
- IEC 60050-808:2002 International Electrotechnical Vocabulary - Part 808: Video cameras for non-broadcasting
- IEC 60050-723:1997 International Electrotechnical Vocabulary - Chapter 723: Broadcasting: Sound, television, data
GOSTR
- GOST IEC 60050-723-2017 International electrotechnical vocabulary. Chapter 723. Broadcasting: sound, television, data
American Society of Mechanical Engineers (ASME)
- ASME STP-NU-062-1-2015 Comprehensive Comparison of International Quality Standards
- ASME STP-NU-062-2013 Comprehensive Comparison of International Quality Standards
ETSI - European Telecommunications Standards Institute
- PRI-ETS 300 101-1992 Integrated Services Digital Network (ISDN); International Digital Audiographic Teleconference
- I-ETS 300 101-1993 Integrated Services Digital Network (ISDN); International Digital Audiographic Teleconference
RO-ASRO
- STAS 737/14-1983 International system of units (SI) UNITS CHARACTERISTICS QUANTITIES OF ATOMIC AND NUCLEAR PHYSICS
Lithuanian Standards Office
- LST ISO 10957:2009 Information and documentation - International standard music number (ISMN) (ISO 10957:2009, identical)
SAE - SAE International
- SAE EIA-765-A-2015 International and National Quality Standards Index (Formerly TechAmerica EIA-765-A)
RU-GOST R
- GOST R 53726-2009 Quality of service ?international telephone communication?. Quality indices
Code International,international unit,video volume,international News,Instrument International,international code,international level,international medicine,international spectrum,Mobile International,volume calculation,International Wood International,volume,Volume of various products,sound measurement,volume reference,audio equipment volume,volume detection,volume detection,headphone volume