JPS55136800A - Speaker measurement unit - Google Patents

Speaker measurement unit

Info

Publication number
JPS55136800A
JPS55136800A JP4415079A JP4415079A JPS55136800A JP S55136800 A JPS55136800 A JP S55136800A JP 4415079 A JP4415079 A JP 4415079A JP 4415079 A JP4415079 A JP 4415079A JP S55136800 A JPS55136800 A JP S55136800A
Authority
JP
Japan
Prior art keywords
circuit
fed
peak value
amplitude
speaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4415079A
Other languages
Japanese (ja)
Inventor
Atsushi Sasaki
Masaharu Kobayashi
Yasuaki Awanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4415079A priority Critical patent/JPS55136800A/en
Publication of JPS55136800A publication Critical patent/JPS55136800A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE:To display the state together with the frequency characteristics, by adding the circuit processing the speaker output signal and automatically operating the upper and lower amplitude ratio of great amplitude signal such as tone burst waves. CONSTITUTION:The tone burst wave produced at the tone burst generator 1 is amplified at the power amplifier 3 through BPF2, the signal is fed to the measured speaker 4 in the non-echo room L, and the sound waves from the speaker 4 are received at the microphone 5. The electric signal from the microphone 5 is amplified at the preamplifier 6 and the output is distributed into the paths i and j for processing. Further, the plus component of the amplitude waveform is picked up at the half wave rectifying circuit 13 of the path i and the peak value is detected at the peak value detection circuit 15 and fed to the division circuit 16. On the other hand, the polarity of the waveform is inverted at the polarity inversion circuit 11 of the path j, the peak value of the minus component of the amplitude waveform is detected at the half wave rectifying circuit 12 and the peak value detection circuit 14 and it is fed to the circuit 16, the ratio of amplitudes operated at the circuit 16 is fed to the level recorder to display the frequency characteristics together with the amplitude ratio.
JP4415079A 1979-04-13 1979-04-13 Speaker measurement unit Pending JPS55136800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4415079A JPS55136800A (en) 1979-04-13 1979-04-13 Speaker measurement unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4415079A JPS55136800A (en) 1979-04-13 1979-04-13 Speaker measurement unit

Publications (1)

Publication Number Publication Date
JPS55136800A true JPS55136800A (en) 1980-10-24

Family

ID=12683593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4415079A Pending JPS55136800A (en) 1979-04-13 1979-04-13 Speaker measurement unit

Country Status (1)

Country Link
JP (1) JPS55136800A (en)

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